NYGH 2026 Revision Topical SQ and MCQ

1 2026 EOY Revision Mechanics Topical Name: ____________________ ( ) Class: 3/ _____ Date: _________ Kinematics 1 A car moves along a straight road. The displacement-time graph is shown below. When is the car decelerating? A AB B CD C DE D EF ( ) 2 The diagram below shows a ball of mass 0.50 kg thrown vertically upwards with a velocity of u. The ball reaches a maximum height of 5.0 m before it starts falling to the ground. Assuming that air resistance is negligible, what is the magnitude of u? A 7.07 m s-1 C 50 m s-1 B 10 m s-1 D 100 m s-1 ( ) displacement time A 0 B C D E F 5 m u ground

2 3. Which of the following statements about a body is correct? A A body which is momentarily at rest can have acceleration. B A body will have acceleration when it is moving with a uniform velocity. C A body can have a varying speed but no acceleration. D A body can have a constant velocity and varying speed. ( ) 4. A velocity-time graph of an object moving in a straight line is shown below. Briefly describe the motion shown by the sections labelled. (a) ………………………………………………………………………………………[1] (b) ………………………………………………………………………………………[1] (c) ………………………………………………………………………………………[1] velocity / m s-1 (a) time /s (b) (c)

3 5 An object was projected up a rough inclined plane at time t = 0 s with a velocity of 3.5 m s −1, and returned to its starting point at t = 1.6 s. Fig. 5.1 shows how its velocity changes with time. Fig. 5.1 (a) Determine the acceleration of the object between t = 0 s and t = 0.60 s. acceleration = ......................................... [2] (b) Determine the maximum distance that the object travelled up the inclined plane. distance = ......................................... [2] (c) Determine the object's speed at t = 1.6 s. speed = .........................................[2] t / s 0.20 0.40 0.60 0.80 1.0 1.2 1.4 1.6 3.5 0 velocity / m s−1

4 6 A man standing on a platform above ground throws a stone up with an initial velocity of 12 m s-1. The stone hits the ground after 3.8 s. (a) Calculate the velocity at which the stone hits the ground. velocity = ………………….[2] (b) Determine the height of the platform from the ground. height = …………………[2] Solutions Q1 Q2 Q3 A B A 4 (a) constant acceleration / velocity increasing at a constant rate (b) decreasing acceleration / velocity increasing at a decreasing rate (c) increasing deceleration / velocity decreasing at an increasing rate 5 (a) a = -5.83 m s-2 (b) max distance = 0.5 × 0.60 × 3.5 = 1.05 m (c) Since object returns to its starting point, 1.05 = 0.5 × 1.0 × v speed = 2.1 m s-1 6 (a) 26 m s-1 (downwards) (b) height = 26.6 m

5 Dynamics 1. A man of mass 60 kg stands on a weighing scale in a lift. When the lift is ascending at a constant acceleration of 1.0 m s-2, what is the reading on the weighing scale? A 540 N B 600 N C 640 N D 660 N ( ) 2. The diagram below shows a submarine of mass 1000 kg rising from the sea bed at a constant velocity of 8.0 ms-1. What is the resultant force acting on the submarine? A 0 N C 10 000 N B 80 N D 100 000 N ( ) 3. A 10 kg mass is initially held at rest on a rough bench and a 20 kg mass is attched to it as shown. A frictional force of 20 N opposes the motion of the 10 kg mass. What is the acceleration of the 10 kg mass? A 2.7 m s-2 B 3.0 m s-2 C 4.0 m s-2 D 6.0 m s-2 ( ) 20 kg 10 kg friction = 20 N 8.0 ms-1

6 4. Fig. 4.1 shows a wind blowing from right to left and exerting a constant force of 30 N on a wooden block of mass 2.0 kg. The block is pulled along a rough surface at a constant speed of 60 m s-1 by a steady force of 20 N. (a) Complete the table for the five forces acting on the block. [2] Name of force Size and direction of force (i) Pulling force 20 N to the left (ii) Force of wind 30 N to the left (iii) (iv) Normal contact force 20 N upwards (v) (b) After 2.0 s, the pulling force is instantaneously replaced by a constant pushing force of 20 N acting on the same point. Assume all other forces remain constant, (i) Calculate the magnitude of the acceleration of the block just after the replacement of the pulling force magnitude of the acceleration = ……………..…. [2] (ii) Describe the speed of the block for the next 3.0 s. ....................................................................................................................................... ...................................................................................................................................[1] (c) Draw a speed-time graph for the block during the above 5.0 seconds in the grids below. [3] speed / m s-1 Fig. 4.1 Pulling force 20 N time / s Direction of wind 2.0 kg Force of wind 30 N

7 5 (a) State Newton’s first law of motion. ...................................................................................................................................... ...................................................................................................................................... ................................................................................................................................. [2] (b) Fig 5.1 shows a ball of mass 5.0 kg hanging from a string that is pulled to one side by another horizontal string so that the first string makes an angle of 40 with the horizontal. By drawing a scale diagram, determine the magnitude of tensions T1 and T2. T1 = ………………… T2 = …………….. [4] T1 T2 5.0 kg ball Fig. 5.1 wall 40

8 Solutions Q1 Q2 Q3 D A D 4 (a) Name of force Size and direction of force (iii)Friction 50 N to the right (v)Weight or Gravitational Force 20 N downwards (b) (i) F = ma 30 – 20 – 50 = 2.0 (a)  a = -20 ms-2 magnitude of a = 20 ms-2  (ii) Speed decreases to zero  (v = u + at = 60 + (-20)(3) = 0) (c) 5 (a) Newton’s first law states that • an object at rest will remain at rest and • an object in motion will continue in motion at constant speed in a straight line • unless a resultant force acts on it. [2] (b) Correct scale  Correct closed triangle  T1 = 78 N  T2 = 60 N  speed / m s-1 time / s 60 0 0 2.0 4.0 6.0 Values on both axis  Horizontal line from 0 – 2 s  Correct shape from 2 - 5 s  Allow ecf

9 Energy, Work and Power 1 The figure below shows the side view of a smooth roller coaster track. A roller coaster car is released from position P. Which of the following statements is/are true? I The total energy is the same at each of the three positions shown. II The energy in the kinetic store of the car is greater at Q than at R. III The energy in the gravitational potential store of the car is greater at R than at P. A I only B I and II C I and III D I, II and III 2 A car travels along a level road. At P, the car has 10 kJ of energy in its kinetic store. Between P and Q the energy input from the petrol is 50 kJ, and the car loses 3