Dynamics — AS & A Level Physics (9702) questions by topic
Dynamics here means Newton's third law pairs, resultant force and momentum change, equilibrium under four perpendicular forces, and picking out the one incorrect word equation linking force, mass and moments.
Identify and deduce top the command word list, alongside calculate, explain and state, each worth between 1 and 6 marks across the set. This page holds 26 real questions from 2023 to 2025 papers, short enough to run through in a single focused session and submit for instant marking, catching a mixed-up sign on momentum change or a misapplied resultant-force definition before it becomes a habit.
May–June 2025, Paper 11
A firework travels vertically upwards in air. Gases are pushed vertically downwards from the firework. Several forces that act on the firework and gases are shown: thrust upward…
Answer this question and get it marked →May–June 2025, Paper 12
A rocket engine ejects 90 kg of exhaust gas per second at a velocity of 190 m s^-1 relative to the rocket. What is the force acting on the rocket due to the ejected gas? A 2.1 kN…
Answer this question and get it marked →A cyclist is riding at a constant speed on a level road. According to Newton's third law of motion, what is equal and opposite to the backward push of the back wheel on the road?…
Answer this question and get it marked →May–June 2025, Paper 13
Two spheres are falling at terminal velocity through a viscous fluid. The spheres are made of the same material but one sphere is denser than the fluid and one sphere is less…
Answer this question and get it marked →Which statement defines force? A Force is the rate of change of acceleration. B Force is the rate of change of momentum. C Force is the product of mass and velocity. D Force is…
Answer this question and get it marked →Four forces act on an object: 20 N to the left, 20 N to the right, 12 N upwards, 12 N downwards. Which statement correctly describes the motion of the object? A The object…
Answer this question and get it marked →May–June 2025, Paper 14
Which word equation is NOT correct? A force = change of momentum B force = mass × acceleration C force = moment / (perpendicular distance from the pivot) D force = work done /…
Answer this question and get it marked →A skydiver is falling vertically with terminal velocity when their parachute opens fully. Which statement describes the motion of the skydiver for the first few seconds after the…
Answer this question and get it marked →Two gliders are travelling towards each other on a horizontal air track. Glider P has mass 0.30 kg and is moving with a constant speed of 1.2 m s⁻¹. Glider Q has mass 0.60 kg and…
Answer this question and get it marked →May–June 2024, Paper 11
A golf club hits a golf ball. The graph shows how the force F on the ball varies with time t (a triangular pulse rising then falling back to zero). Which graph shows how the…
Answer this question and get it marked →What is meant by the mass and by the weight of an object on the Earth? mass weight --- --- --- A its momentum divided by its velocity the work done in lifting it one metre B the…
Answer this question and get it marked →May–June 2024, Paper 12
A football is kicked so that it moves vertically upwards through the air. What is the variation in the air resistance and the resultant force acting on the ball as it moves…
Answer this question and get it marked →May–June 2024, Paper 13
Newton's third law describes two forces that are equal in magnitude and form a pair. Which description of the two forces in such a pair is not correct? A They act in opposite…
Answer this question and get it marked →The graph shows the variation with time of the speed of a raindrop falling vertically through air. The speed increases from zero, with a decreasing gradient, reaching a constant…
Answer this question and get it marked →October–November 2024, Paper 11
A lift (elevator) consists of a passenger car supported by a cable that runs over a light, frictionless pulley to a counterbalance. The counterbalance falls as the passenger car…
Answer this question and get it marked →October–November 2024, Paper 13
Two objects X and Y form an isolated system. X and Y collide and then separate. The mass of X is greater than the mass of Y. Which statement about the collision is correct? A The…
Answer this question and get it marked →Which row states whether total momentum and total kinetic energy are conserved in an inelastic collision in which there are no external forces? total momentum total kinetic energy…
Answer this question and get it marked →February–March 2023, Paper 12
Which expression defines force? A (mass x change in speed) x time taken B (mass x change in speed) / time taken C (change of momentum) x time taken D (change of momentum) / time…
Answer this question and get it marked →A ship of mass 8.4 x 10^7 kg is approaching a harbour with speed 16.4 m s^-1. By using reverse thrust it can maintain a constant total stopping force of 920 000 N. How long will…
Answer this question and get it marked →May–June 2023, Paper 11
A box rests on the Earth, as shown. Newton's third law describes how forces of the same type act in pairs. One of the forces of a pair is the weight W of the box. Which arrow…
Answer this question and get it marked →May–June 2023, Paper 12
A submarine of total mass 3200 kg is at rest underwater. The total mass of the submarine is suddenly decreased by 200 kg by pumping water out of the submarine horizontally in a…
Answer this question and get it marked →May–June 2023, Paper 13
Each diagram illustrates a pair of forces of equal magnitude. Which diagram gives an example of a pair of forces that is described by Newton's third law of motion? A the driving…
Answer this question and get it marked →May–June 2023, Paper 21
A block is pulled in a straight line along a rough horizontal surface by a varying force X, as shown in Fig. 3.1. Air resistance is negligible. Assume that the frictional force…
Answer this question and get it marked →October–November 2023, Paper 11
A man stands in a lift that is accelerating vertically downwards. Which statement describes the force exerted by the man on the floor? A It is equal to the weight of the man. B It…
Answer this question and get it marked →October–November 2023, Paper 12
Two blocks, of mass 0.20 kg and 0.50 kg, are connected by a light inextensible string that passes over a frictionless pulley. The blocks are initially held stationary. The block…
Answer this question and get it marked →A resultant force causes an object to accelerate. What is equal to the resultant force? A the acceleration of the object per unit mass B the change in kinetic energy of the object…
Answer this question and get it marked →Other AS & A Level Physics topics
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