Question 1
1 markWhich of the following equations correctly represents the total stopping distance of a vehicle?
Pearson Edexcel IGCSE · Physics
Forces, movement, shape and momentum: Practice Questions
5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Forces, movement, shape and momentum.
10 questions28 marksFree, no account
Question 2
1 markA car of mass \(1200\text{ kg}\) is traveling at a constant velocity of \(20\text{ m/s}\). The driver applies the brakes, and the car comes to a complete stop in a time of \(4.0\text{ s}\). Calculate the magnitude of the average braking force acting on the car.
Question 3
1 markA uniform wooden plank of length \(4.0\text{ m}\) is balanced at its center on a pivot. A weight of \(300\text{ N}\) is placed on the plank at a distance of \(1.5\text{ m}\) from the pivot. At what distance from the pivot must a \(450\text{ N}\) weight be placed on the opposite side to maintain equilibrium?
Question 4
1 markA wooden block is being pushed to the right along a rough horizontal floor. In which direction does the friction force act on the block?
Question 5
1 markA constant unbalanced force acts on an object of mass \(0.5\text{ kg}\) for a time of \(2.0\text{ s}\). This force causes the velocity of the object to increase from \(4.0\text{ m/s}\) to \(10.0\text{ m/s}\). Calculate the magnitude of the force.
Question 6
2 marksState Newton's third law and describe the relationship between the magnitude and direction of the action and reaction forces.
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Question 7
4 marksA uniform horizontal beam is pivoted at its center. A downward force of \(15\text{ N}\) is applied at a distance of \(40\text{ cm}\) from the pivot point. Calculate the magnitude of the moment of this force in Newton metres (\(\text{Nm}\)).
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Question 8
6 marksA light horizontal beam is supported at both ends, A and B, which are \(2.0 \text{ m}\) apart. A \(60 \text{ N}\) weight is placed on the beam at a distance of \(0.5 \text{ m}\) from end A. Calculate the upward support force acting at end B.
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Question 9
4 marksAn object of mass 5.0 kg is placed on a rough horizontal surface. A horizontal force of 20 N is applied to the object, causing it to accelerate at 2.5 m/s2.
a) Calculate the resultant force acting on the object.
b) Determine the magnitude of the friction force acting on the object.
c) If the object is pulled for a distance of 8.0 m, calculate the work done against friction during this displacement.
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Question 10
7 marksA light horizontal beam of length \(5.0\text{ m}\) is supported by two vertical wires, X and Y, attached to its ends. A painter of weight \(750\text{ N}\) stands on the beam at a distance of \(2.0\text{ m}\) from wire X. The system is in equilibrium.
a) By taking moments about the point where wire X is attached, calculate the tension in wire Y.b) Determine the tension in wire X.
c) The painter walks slowly along the beam from wire X towards wire Y. Explain, with reference to moments, how the tension in wire Y changes as the painter moves.
d) Explain why the mass of the beam was neglected in your calculations, and define the term centre of gravity.
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