Moment Of Force Questions And Solutions

As shown in figure below; Solution. The first step of understanding and calculating torque is identifying the moment arm. Hear from Trailblazers who are driving their companies forward and get actionable insights on how you can drive yours. Discover the relationships between angular acceleration, moment of inertia, angular momentum and torque. There are two basic formulas that we’ll be using here. 9d-Thermodynamics FR practice problems-ANSWERS. (See the right figure below. more forces. Replace the above two Forces with a Couple= F. The force and moment of reactions at supports can be determined by using the 3 equilibrium equations of statics i. An answer to the question: Why is there no gravity in space? Questions and Answers - In space we feel weightlessness because the earth's gravity has less effect on us. Force equilibrium: R 1 = 10N Taking moments about A: -M 1 + 10·2 = 0 → M 1 = 20Nm Uniformly Distributed Load (UDL) Below is a brick lying on a beam. One time one of his students tried to get more helpful information by asking if there was another way to solve the problem. Formula Book All C1 Revsion Notes All C2 Revsion Notes All C3 Revsion. Part A = B A is out of the page. Forces Mechanics Physics Contents Index Home. For the left figure below, replace the distributed loads by an equivalent resultant force and a couple moment acting at point A. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Physics merry go round moment of (intertia / force) question. Explaine what is meant by the moment of a force about a point? Another moments of force at different points question? 9 answers High speed camera capturing. Here we can calculate Moment, Force, Lever Arm Length. Throughout the Trent Williams debacle, there have been far more questions than answers. moment - a turning force produced by an object. In statics, moments are effects (of a force) that cause rotation. Force Pairs and Newton's Third Law Newton's Third Law states that forces always act in pairs. The torque spanner used has a calibration in ft. Bending moment M/I = E/R = Sigma/y M= moment I= moment of inertia E= youngs modulus R= radius of curvature y= distance of element from centre axis Sigma= stress Torsion T/J = G*angle/L= tou/R T= torque J= polar moment of inertia G= modulus of rigi. For example, describe a time when you realized your skills needed brushing up and then talk about what you’ve done to improve yourself. 35 m from the hinge at O. 2 Bending moment (M) 69 6. force, (b) shear forces that produce clockwise moments and (c) bending moments that result in tension stresses in the interior frame fibers. Don’t let these intentionally weird interview questions trip you up. Fortunately, there are easier ways to measure forces. It is obvious some will agree with the president while others will not. An answer to the question: Why is there no gravity in space? Questions and Answers - In space we feel weightlessness because the earth's gravity has less effect on us. The magnitude of moment is equal to the product of the force and the perpendicular distance from the axis to the line of action of the force. Consider a turning moment diagram for a single cylinder double acting steam engine as shown in Fig. Questions are taken from the pre 2010 exam papers. Engineering Statics (EngM 223) Department of Engineering Mechanics. In the equations below, the forces and moments are those that show on a free body diagram. 3 minutes more on the phone. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Physics moment of inertia question? An object is formed by attaching a uniform, thin rod with a mass of mr = 7. (3 marks) c) Describe the motion of the submarine. F1 x = 500(4/5) F1 y =500(3/5) F2 x =600cos(60) F2 y =600sin(60) The problem for me is when it comes time to add their moments. 6 Rb = 12 N. Postmedia Solutions gives you the power to grow your business. 50 s to reach the bottom of the incline. The answers you seek pulse inside of you waiting for their moment to be unleashed. Here’s a run-down of the interview – note that these answers are summarizations and not an accurate script of Snowden’s words. Answer: Numbers are cumbersome, so let’s start by letting m be the mass of the block, µ the angle, h the height, M the mass of the pulley, R its radius, and a the acceleration felt by the block. A moment is a "turning force" caused by a force acting on an object at some distance from a fixed point. I posted a problem here, each week from 2002 to 2004. 4 Forces in One Dimension CHAPTER Practice Problems 4. The magnitude of the electrostatic force on the larger charge and on the smaller charge (in N) is, respectively, Answer: 2. Let first draw shear force diagram. 04 m to a uniform sphere with mass ms = 37. The calculator can accommodate up to 2 point loads, 2 distributed loads and 2 moments on a single beam, which will allow you to enter any number of combinations of loads that you may be asked in a single beam analysis question. Concept: Turning Effect of Force (Moment of Force). Electrostatics FR. Since our best theory of gravity at the moment is Einstein's general theory of relativity, we have to delve into some results of this theory to understand black holes in detail, but let's start of slow. 3 Parallel forces 28 2. The turning effect (or moment) of a force is given by: moment = force × perpendicular distance from pivot. d is the distance from the fixed axis. 5 Uniformly distributed loads 78 7 First and second moment of areas 84 7. a = -vi2/(2x) = -(15. (See the right figure below. Two forces act on the block: the gravitational force exerted by the earth on the block, and a force, called the normal force exerted by the plane on the block (see Figure 5. But the rod tends to rotate, thus turning effect produced by force is known as moment of force or torque. From determining your spirit animal to which famous person you would choose to be for a day, hiring managers like to force you off the traditional path to see how you think and what that reveals about you. 5 Equations of equilibrium of coplanar forces 33 2. Of course changing the origin of your SRS will change the torque. - The resultant was obtained by summing or integrating over the areas or volumes. 12 Answers to exercises 16 2 Moments 25 2. I hope that helps (I hope it's right!). Shear and Moment Diagrams Let's consider the case where a concentrated force and/or a couple are applied to the segment. The weight of the beam is negligible when compared to the forces that act on the beam. Static equilibrium for a rigid body: A body (or any part of it) which is currently stationary will remain stationary if the resultant force and resultant moment are zero for all the forces and couples applied on it. “The regional countries benefit from talks and not conflicts,” Masjedi and Hakim said during their meeting in Baghdad on Tuesday. 00N/m , and a couple moment M = 60. Hence the body is in translational equilibrium. Draw one Free Body Diagram for each object (see below for what is a good FBD). This is a serious question because I sort of want them to start like 0-14 which would force some change. If distance of AB = BC = 20 cm, what is the moment of force about point C. Solution: a. Solution Determine the moment of the force FC about the door hinge at A Solution Determine the moment of the force FC about the door hinge 1,200,000+ Questions. 232 Moment of a force about points O and B Problem 232 In Fig. Clockwise moment = 600 x 2 Nm. Pearson Education accepts no responsibility whatsoever for the accuracy or method of working in the answers given. Some stress is expected and can be a positive force in our lives. Chapter 2 Review of Forces and Moments 2. (4-29 Hibbeler, 11e) If the resultant moment about point A is 4800N m clockwise, determine the magnitude of F~ 3 if F 1 = 300N and F 2 = 400N. All Force and Laws of Motion Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks. The moment of inertia is a geometrical property of a beam and depends on a reference axis. 1 Concept of Force Equilibrium of a Particle You are standing in an elevator, ascending at a constant velocity, what is the resultant force acting on you as a particle? The correct response is zero: For a particle at rest, or moving with constant. Three forces act on a rod, F A = F C = 10 N and F B = 20 N, as shown in figure below. The smaller the object's mass, the faster it will end up traveling, for a given push. a = -vi2/(2x) = -(15. The units are Newton-meters. That's also often called the lever arm, if you're talking about a simple machine, and I think that's the term I used when I did a video on torque: moment arm. Tim : Part of the fun of answering mailbag questions is we respond a couple of days later. 2In this lab the lever arm will be the radius at which the force is applied (the radius of the axle). Engineering help. On October 9, Turkish forces opened a new front in the. Force equilibrium: R 1 = 10N Taking moments about A: -M 1 + 10·2 = 0 → M 1 = 20Nm Uniformly Distributed Load (UDL) Below is a brick lying on a beam. 1 Centroids 84 7. 0 m above the throwing point. As shown in figure below; Solution. resistance (no air), no force of gravity - and because there is no need to produce a forward force from its rockets, it will travel at a constant speed. Here’s a run-down of the interview – note that these answers are summarizations and not an accurate script of Snowden’s words. the moment of a force that produces some component of rotation about (or along) a specific axis ! We can use all the we have learned up to this point to solve this type of problem 6 Moments Along an Axis, Couples Monday, September 24, 2012 Moment about an Axis ! First select any point on the axis of interest and find the moment of the force. A uniform beam has length 8 m and mass 60 kg. Use the sample questions and "Best Answers" listed at the end of this article to help you prepare your own personalized responses. To help you refresh your memory take up the quiz below and see if you understood the turning effects of forces and ensure that you get to read up some more on the topic. Determine the x, y, z components of force and moment at point C 1 answer below » Determine the x, y, z components of force and moment at point C in the pipe assembly. The magnitude of the acceleration tells us the magnitude of the force; the direction of motion of the mass tells us the direction of the force. Enter Positive Value If The Sense Of Direction Of The Couple Moment Is The Same As That Of The Resultant Force And Negative Value If The Sense Of Direction Of The Couple Moment Is Opposite To That Of The. The fluctuation of energy may be determined by the turning moment diagram for one complete cycle of operation. These objective type Theory of Machines - 1 questions are very important for campus placement test, semester exams, job interviews and competitive exams like GATE, IES, PSU, NET/SET/JRF, UPSC and diploma. 2 kg and radius R = 1. The moment arm (lever arm) of a force system is the perpendicular distance from an axis to the line of action of a force. These questions are based on the EdExcel IGCSE Physics (4420) specification. Questions For Thought What is the moment about point B and about point D for both of the cases shown in the wrench example above?. Resolving Forces, Calculating Resultants Ref: Hibbeler § 2. They are responsible for many of the physical properties of substances, including their melting and boiling points. Gravity Questions (click on the question to reveal the answers). Although algebraically identical units to Joules, Joules are NOT suitable units for torque. Forces and Motion. 5 Equations of equilibrium of coplanar forces 33 2. Forces and Motion. Students learn to become scholars by learning to ask good questions. ) Let a = 4. 6 Applications 35 2. A thread, a spark, a creative impulse sets you on the path. The vertical ordinate represents the turning moment and the horizontal ordinate (abscissa) represents the crank angle. Use the sample questions and "Best Answers" listed at the end of this article to help you prepare your own personalized responses. In order to be successful, you need a strategy—not scripted answers. Moment of force is a vector(has magnitude and direction). The "F" stands for force, "m" stands for mass and "a" is for acceleration. Questions are taken from the pre 2010 exam papers. Equilibrium of rigid bodies. Very useful resource for students and teachers. That question and countless others drive director Ed Perkins’ puzzle-box portrait “Tell Me Who I Am,” a neatly constructed re-creation of the process by which Alex Lewis relied on Marcus to. The multiple choice questions will mostly be taken from H W, Lecture, Lecture Quizzes, Discussion Quizzes, previous exams and the textbook. 7m Resultant force on gate (F) = ? Cp ( ) = ?. Red Hat connects enterprises seeking open source solutions with the communities that create those solutions. moment synonyms, moment pronunciation, moment translation, English dictionary definition of moment. moment = force applied × distance from a pivot. 4-19 c are The moment is therefore Ans. If he applies a horizontal force of 80lbf to the handle of. Struts and Ties: 5. InformationWeek. The smaller the object's mass, the faster it will end up traveling, for a given push. [ Examples "C" and "D. Force is the product of mass and acceleration. 5 N, up F frict = 27. An object has the same mass on the Earth, on the Moon, or far out in deep space. 10 Generalizations for forces acting at a point 13 1. Moment of force formula can be applied to calculate the moment of force for balanced as well as. Abrams and the cast of the highly-anticipated film take some time for a Q&A session with Star Wars fans. In other words, moment arm determines the quality of the torque. The heavier the person (force), and the farther s/he walks out on the board (distance), the greater the "turning force," which acts on the concrete foundation (fixed point). the weight W creates a moment WL that balances the buoyancy force F bL b. The levels are only a very rough guide !!! More for me to get them to the correct person than an actual nailled on level. Question: Determine The Moment Of Force F About Point O. The force must be in Newtons (N), the distance in metres (m), and we measure moments in "Newton Metres"(Nm) Answer these :-What is the moment of this force ? What is the moment of this force? What is the length of this lever if the moment is 8 Nm ? For a see-saw to balance, the moments on each side must be the same. Vector Forces. Structural Forces: 6. • Force (Flexibility) Method For determinate structures, the force method allows us to find internal forces (using equilibrium i. 232 Moment of a force about points O and B Problem 232 In Fig. 3 Centroid of area between a curve. Skip to content Engineering interview questions,Mcqs,Objective Questions,Class Notes,Seminor topics,Lab Viva Pdf free download. One tractor pulls with a force of 3000 N west and the other tractor pulls with a force of 2500 N in a southerly direction because of the terrain. 50 s to reach the bottom of the incline. Explaine what is meant by the moment of a force about a point? Another moments of force at different points question? 9 answers High speed camera capturing. Customers rely on Red Hat as their guide to a fast-moving ecosystem of open source innovation. It is a vector quantity. Draw shear force and bending moment diagrams for the beam. Shear Force. So, let's lay out those questions. moment of force? The connected bar BC is used to increase the lever arm of the crescent wrench as shown. Moments Questions For each situation below, determine the moment of the force, and state the direction in which it acts. Shear and Moment Diagrams Let's consider the case where a concentrated force and/or a couple are applied to the segment. The larger the Moment of Inertia the less the beam will bend. 1(b) can be seen to be equivalent to the beam sign convention rotating columns AB and CD to line up with beam BC. This axis is perpendicular to the plane containing the line of action of the force. 4 kg with a height of 22 cm, and an average shelf holds 29 books, how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start?. Exam Questions - Moments horizontal beams. moment of inertia of the whole object about an axis through the centres of the disks. " ] When the force in one direction are bigger than the forces in the other directions, this is shown on the free body by having one arrow is longer than the other. Principle of moment quiz questions and answers pdf, as we have learnt that moment of force is f × d, so formula for weight in relevance to moment of force will be, with answers for physics certifications. It has been possible to see this moment coming for quite a while. This force must be present since in its absence mass m will experience free fall (instead of sliding motion). the weight W creates a moment WL that balances the buoyancy force F bL b. The smallest Moment of Inertia about any axis passes throught the centroid. There are two basic formulas that we’ll be using here. A Level (Edexcel) All A level questions arranged by topic. The moment of a force (also known as torque) provides a measure of the tendency of that force to cause rotation about a given point (or axis). That was six years ago. Such rotational motion effect is caused by a moment of a force. Questions & Answers on Friction. Forces and Moments: Part 1 Moment of Force F around point O: MO The moment of a force about a point or an axis provides a measure of the tendency of the force to cause a body to rotate about the point or axis. Moments of a force playl. Stuck on a tricky physics problem? Study. 7 Answers to exercises 37 3. Recall that the bending moment and shear force diagrams are related by: dM (x) Shear force V = ----- dx The change in the shear force at the supports corresponds to the vertical support reaction (details given below). Balance of Force and Moment Preparatory Questions Goals: During this experiment, you will: • develop a better understanding of the concept of moment; • build intuition about balance of forces and moments on a rigid body. forces on the foundation, and upward reactive forces are consequently developed. It’s the perfect balance of creativity and science to propel brand awareness, engagement, conversion and loyalty. Solution: a. This Book Aims To Develop This Ability In Students By Explaining The Basic Principles Of Mechanics Through A Series Of Graded Problems And Their Solutions. Determine the moment of this force about. Exam Questions – Moments horizontal beams. (The extra reactions are called redundant and represent. The unit of force in S. Moments can either be clockwise or anticlockwise. It should be noted that the same shear is opposite in direction in the left and right sections. Moment of force, Varignon's Theorem????? I'm having difficulty in identifying if the diagonal (with degree) force is negative or positive in moment of force problems I need some tips or recommended websites to understand this fully. What is a black hole?-----Loosely speaking, a black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull. Family seeks answers after police kill Texas woman at home who’s been on the force since April 2018, is on administrative leave pending the outcome of an investigation and will be. We blend media expertise with smart marketing. Neglect the weight of the pipe. Determine the x, y, z components of force and moment at point C 1 answer below » Determine the x, y, z components of force and moment at point C in the pipe assembly. You may have to read through some of the page before you find the answer. They are responsible for many of the physical properties of substances, including their melting and boiling points. Science Bowl PHYSICS Physics - 4 PHYS-91; Short Answer: A box is initially at rest on a horizontal, frictionless table. Moments quiz questions and answers pdf, moment of a force is defined as, with answers for physics certifications. The moment of force is hence force times distance from an axis. The special case of forces in equilibrium (static), occurs when the acceleration of the object is zero. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. Static Equilibrium Force and Moment 2. Find the moment for each force separately. Weight is due to gravity attracting the mass towards the centre of the Earth. Even More Forces In Action: 8. 1 Centroids 84 7. For example, forces that are keeping children in poverty may be: lack of education, inadequate health care, poor nutrition, violence in homes. Moments of a force playl. CENTROIDS AND FIRST MOMENTS OF AREA A moment about a given axis is something multiplied by the distance from that axis measured at 90o to the axis. - Duration: 4:10. " Either method. [ Examples "C" and "D. The program -- which goes by the acronym "JEDI" for "Joint Enterprise Defense Infrastructure" -- has been. 1 Moment of force 25 2. There are explanations for some of the questions after you submit the quiz. There are two basic formulas that we’ll be using here. Does God Exist - Six Reasons to Believe that God is Really There - Is There a God Written by a former atheist, this article gives you six clear reasons to conclude that God exists. Static Equilibrium Force and Moment 2. Interacting bodies cause equal and opposite forces and moments on each other. 5 Solution: The magnitiude of the electrostatic for is given by, N. Force is the product of mass and acceleration. It is likely that the new contract may account for the increased revenue;. Why Engineering Mechanics Force System Resultants? In this section you can learn and practice Engineering Mechanics Questions based on "Force System Resultants" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc. The larger the Moment of Inertia the less the beam will bend. The multiple choice questions will mostly be taken from H W, Lecture, Lecture Quizzes, Discussion Quizzes, previous exams and the textbook. Dynamics (Force) problems ask you to relate motion to the forces causing it. Electric Charge Charge is the property associated with matter due to which it produces and experiences electric and magnetic effect. Although algebraically identical units to Joules, Joules are NOT suitable units for torque. Part E = B E is into the page. MOMENT OF INERTIA J3010/2/2 INPUT 2. **Note** Many of the math problems on this page can be found in my new book: The Green-Eyed Dragons and Other Mathematical Monsters. C: Both 1 and 2 D: None of the above ------------------------------------- 12. The further development of artificial intelligence, solutions will most likely see its ability to gather and. FinalAnswer 30,645 views. Pearson Education accepts no responsibility whatsoever for the accuracy or method of working in the answers given. The parameter d is. 1) View Solution. Moment of inertia is the rotational equivalent of mass. When a ball is thrown upwards and reaches its maximum height, does its weight get balanced by air resistances because it is stationary for a moment? Or does it have a force which is horizontal?. Unanswered Questions. Sometimes it is more convenient to solve a problem just using moments. This is the behavior we are trying to nurture. Force is the product of mass and acceleration. NCERT Solutions Class 9 Maths Chapter 9 Force And Laws Of Motion – Here are all the NCERT solutions for Class 9 Maths Chapter 9. 2 kN, as illustrated below. 2016 Revision Questions. The moment of a force gives a measure of the amount of turning a force can produce when it is applied to a rigid body about a point. Check your result graphically. And with Williams reporting to the Redskins on Tuesday — an event that pretty much came out of nowhere — there are now even more things to wonder about. The resultant moment vector acts perpendicularto that plane. SI unit of moment of a force is Newton-metre (Nm). 4 kg with a height of 22 cm, and an average shelf holds 29 books, how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start?. • Identifying Forces Chapter 5. Physics Questions Translational Motion A force of 200 N acts tangentially on the rim of a wheel 25 cm in radius. You know many forces such as gravity, tension, and normal force that are present even if not listed in the problem. (See the right figure below. Moment of inertia is the rotational equivalent of mass. Question 5 If a net force of 7 N was constantly applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s? a. Consider the diving board sketch in Figure 5. We have to work through our problems and find constructive solutions. 1) View Solution. How will the ‘who’ from your above answer benefit from what you ‘do’? 5. force, we need to get hold of a 1 kg mass, have the force act on it somehow, and then measure the acceleration of the mass. This worksheet is designed for teachers of Physics to support their students in working through moment of force from the very simple questions to more difficult ones. For this acceleration to happen there must be a resultant force, this force is called the centripetal force. The first step of understanding and calculating torque is identifying the moment arm. SOLUTION II (VECTOR ANALYSIS) Using a Cartesian vector approach, the force and position vectors shown in Fig. F F cos θ F sin θ θ Newton's Second Law can be applied in each of the resolved directions. The force of friction on the box. One example you might find easiest to wrap your head around is the see-saw. (2 marks) b) Name each of the forces labelled P, Q and R. Replace this force by an equivalent force and couple moment acting at point O. **Note** Many of the math problems on this page can be found in my new book: The Green-Eyed Dragons and Other Mathematical Monsters. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. x = distance over which the accelerating force acts to bring about a full stop = 50. To calculate the torque on a rectangular loop of current-carrying wire sitting in an external magnetic field. Since they act against each other the net torque equation would appear as: t net. The force must be in Newtons (N), the distance in metres (m), and we measure moments in "Newton Metres"(Nm) Answer these :-What is the moment of this force ? What is the moment of this force? What is the length of this lever if the moment is 8 Nm ? For a see-saw to balance, the moments on each side must be the same. 44 kg and length L = 5. Determine the x, y, z components of force and moment at point C 1 answer below » Determine the x, y, z components of force and moment at point C in the pipe assembly. Anti-clockwise moment = 200 x 6 Nm. Static equilibrium for a rigid body: A body (or any part of it) which is currently stationary will remain stationary if the resultant force and resultant moment are zero for all the forces and couples applied on it. Note that the word “force” isn’t always used explicitly in the statement of the problem. Moment of inertia, in physics, quantitative measure of the rotational inertia of a body—i. Moment of Inertia A vertical differential element of area is Cho. The best way to remember the information in this chapter is to get a pen and paper and write down your answers before clicking on the Answer link which will take you to the correct page. Force and Motion Force is a vector – The net force is the vector sum of the Chapter 5. ) Electricity 3. must treat the element as a thin rectang e. Moments due to Normal Forces Now consider the moment balance depicted in Figure 3. It is a vector quantity. Struts and Ties: 5. Label all forces with their agents, and indicate the direction of the acceleration and of the net force. The moment of inertia of a body, about a given axis, is a measure of its resistance to Angular. 2016 Revision Questions. The torque, or moment of force, is simply $\vec{\tau} = \vec{r} \times \vec{F}$, where $\vec{r}$ is the vector OP, and $\vec{F}$ is your force. Take the Quiz and improve your overall General Knowledge. For our fixed point, we have chosen A. The answers you seek pulse inside of you waiting for their moment to be unleashed. Note in the animation above how when the opposite force vectors are the same length the net force is zero and the body moves with a constant velocity. 5 N, up F frict = 27. Similarly, a muscle that appears to be designed for force production due to a large PCSA, if placed in position with a very small moment arm, may actually produce high joint excursions or angular velocities. Replace the two forces acting on the tree branches by an equivalent force and couple moment acting at point O. The larger the Moment of Inertia the less the beam will bend. The angular speed ( w ) of an object is the angle ( q ) it moves through measured in radians (rad) divided by the time (t) taken to move through that angle. Science Bowl PHYSICS Physics - 4 PHYS-91; Short Answer: A box is initially at rest on a horizontal, frictionless table. In other words, moment arm determines the quality of the torque. That was six years ago. Chapter 9, Distributed Forces: Moments of Inertia • Previously considered distributed forces which were proportional to the area or volume over which they act. Best Answer: Ok usually using the moment rule we get 240*15=mass of ruler *30 thus we get the answer Now another analysis wht i feel will be the right way consider mass per unit length m for the ruler now the moment eqn will be. As usual, we decompose the forces on the block into those that are parallel to the. Electrostatics MC. A Level (Edexcel) All A level questions arranged by topic. Fortunately, there are easier ways to measure forces. Moment of Force Worksheet with Answer. Page 88 Use the screw driver that has a fat handle. 1 Centroids 84 7.