A LevelPhysicsCIETopic Questions3. Dynamics3.2 Non-uniform Motion

Syllabus Edition

First teaching 2023

First exams 2025

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Non-uniform Motion (CIE A Level Physics)

Topic Questions

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1
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An egg is dropped from the top of a three-storey building. It falls through air until it reaches the ground

What remains constant throughout the fall?

  • acceleration of the egg

  • weight of the egg

  • velocity of the egg

  • air resistance on the egg

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2
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A box rests on a horizontal, rough surface. A string attached to the box passes over a smooth pulley and supports a mass at its other end.

cie-ial-images90png

When the box is released, what forces are acting on it?

  • weight only

  • friction and weight

  • friction, weight and reaction

  • tension, friction, weight and reaction

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3
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An object of weight mg falls through the air and experiences a drag force D.

Which of the following free-body diagrams shows the object when it has reached terminal velocity?

  • cie-mcq-easy-3-2-q3-a

  • cie-mcq-easy-3-2-q3-b

  • cie-mcq-easy-3-2-q3-c

  • cie-mcq-easy-3-2-q3-d

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4
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A skydiver has a weight of 800 N, and experiences a drag force of 450 N.

What is the magnitude and direction of the resultant force of the skydiver?

 

Magnitude / N

Direction

A

1250 

Downwards

B

350 

Upwards

C

1250 

Upwards

D

350 

Downwards

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5
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A lorry is driving along a horizontal road and experiences a resistive force opposing the forward motion.

Assuming that air resistance is negligible, what is the name of the resistive force?

  • Upthrust

  • Weight

  • Friction

  • Normal contact force

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1
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The three forces acting on a hot-air balloon that is moving vertically are its weight, the force due to air resistance and the upthrust force.

The hot air balloon descends vertically at constant speed. The force of air resistance on the balloon is F.

Which weight of material must be released from the balloon so that it ascends vertically at the same constant speed?

  • ½ F 

  • F

  • 2F

  • 4F

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2
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A skydiver falls vertically from a stationary balloon. 

She leaves the balloon at time t = 0. At time t = T, she reaches terminal velocity. Beyond the time shown in the graphs, she opens her parachute

Which graph shows the variation with time t of the force F due to air resistance?

  • cie-ial-images109png

  • cie-ial-images110png

  • cie-ial-images111png

  • cie-ial-images112png

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3
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Two skydivers, A and B, experience drag forces D1 and D2 respectively. Skydiver A has mass m and reaches terminal velocity v1. Skydiver B has mass 2m and reaches terminal velocity v2. 

Given that D space proportional to space v squared, what is the value of v subscript 1 over v subscript 2?

  • 1 half

  • 1 fourth

  • 2

  • fraction numerator 1 over denominator square root of 2 end fraction

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4
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A car of mass m starts from rest and reaches a velocity of v over distance s. The car experiences a frictional force of W over 2, where W is the weight of the car, and has constant acceleration.

What is the driving force of the car?

  • m over 2 fraction numerator left parenthesis v squared over denominator s end fraction plus g right parenthesis

  • m left parenthesis v squared over s plus W over 2 right parenthesis

  • m over 2 left parenthesis v squared over s minus g right parenthesis

  • m left parenthesis v squared over s minus g right parenthesis

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5
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Fig. 1.1 shows two blocks, A and B, that have masses of 3m and 2m respectively. A force, F, is applied to Block A, and both blocks accelerate along a horizontal surface. Block B experiences a drag force of F over 5.

cie-mcq-3-2-q5-cie-ial-physics

Fig. 1.1

What is the resultant force of Block A on Block B?

  • 3 over 5 space F

  • 9 over 5 F

  • F over 5

  • 2 over 5 space F

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1
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A car has a horizontal driving force of 2.0 kN acting on it and a resistive force a quarter of this size. It has a forward horizontal acceleration of 2.0 m s–2

cie-ial-images92png

What is the mass of the car?

  • 500 kg

  • 750 kg

  • 1250 kg

  • 2000 kg

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2
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A stone of mass m is dropped from a tall building. There is significant air resistance. The acceleration of free fall is g.

When the stone reaches its terminal velocity, which information is correct?

 

Magnitude of the acceleration of the stone

Magnitude of the force of gravity on the stone

Magnitude of the force of air resistance on the stone

A

B

C

D

zero

g

g

zero

mg

mg

zero

zero

mg

mg

zero

zero

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3
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A wooden block rests on a rough board. The end of the board is then raised until the block slides down the plane of the board at constant velocity v

cie-ial-images93png

Which row describes the forces acting on the block when sliding with constant velocity?

 

Frictional force on block

Resultant force on block

A

B

C

D

down the plane

down the plane

up the plane

up the plane

zero

down the plane

zero

down the plane

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4
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A block of mass 1.20 kg is on a rough horizontal surface. A force of 12 N is applied to the block and it accelerates at 4.0 m s−2

cie-ial-images94png

What is the magnitude of the frictional force acting on the block?

  • 2.4 N

  • 3.6 N

  • 7.2 N

  • 16.8 N

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5
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A boat travels forward in a straight line. The driving force of the boat is less than the water resistance acting on the boat.

Which statement is true?

  • The boat is travelling at constant velocity

  • The resultant force acts in the same direction as the motion

  • The boat is decelerating

  • The resultant force is equal to the driving force of the boat

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