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IGCSE Physics MCQs - Dynamics Review

Total questions: 72

Worksheet time: 36mins

Name
Class
Date
1.

The diagram shows a rectangular metal sheet close to two rulers. What is the area of the metal sheet?

a)

700 cm^2

b)

675 cm^2

c)

900 cm^2

d)

1125 cm^2

2.

The diagram shows a reading on an ammeter. What is the reading?

a)

0.45 A

b)

0.50 A

c)

4.5 A

d)

5.0 A

3.

The diagram shows the image of a clock in a plane mirror. Which is the actual time?

a)

04:15

b)

04:45

c)

07:15

d)

07:45

4.

The circuit shows a wire WX connected to a cell. The potential difference (p.d.) between W and X is 1.5 V. What is the reading on the voltmeter?

a)

0.4 V

b)

0.6 V

c)

0.9 V

d)

4.0 V

5.

A student uses a ruler to find the volume of water in a tank. She measures the lengths EF and FG.


What other length does she need to measure?

a)

FJ

b)

FK

c)

HI

d)

IJ

6.

A pendulum is set in motion and timed. The time measured for 20 complete swings is 30 s. What is the time for one complete swing of the pendulum?

a)

0.67 s

b)

0.75 s

c)

1.5 s

d)

3.0 s

7.

The diagrams show the scales of three ammeters. Which ammeters show the same current reading?

a)

all three ammeters

b)

ammeter 1 and ammeter 2 only

c)

ammeter 1 and ammeter 3 only

d)

ammeter 2 and ammeter 3 only

8.

The diagrams show the readings on an ammeter in a series circuit before and after the switch in the circuit has been closed.


What is the current in the circuit when the switch is closed?

a)

3.2 A

b)

3.4 A

c)

3.6 A

d)

3.8 A

9.

Diagram 1 shows a voltmeter that is not connected to anything. It shows a small reading, called a zero error, because it is not correctly adjusted.


Diagram 2 shows the same meter used to measure the p.d. across a resistor in a circuit.


What is the p.d. across the resistor?

a)

4.6 V

b)

4.7 V

c)

5.2 V

d)

5.4 V

10.

Each of the following blocks is a different type of metal. Each block has a mass of 12 g.


Which metal has the largest density?

a)
b)
c)
d)
11.

A student measures the volume of a small irregularly-shaped stone.


Which apparatus must be used?

a)

a measuring cylinder containing water and a ruler only

b)

a measuring cylinder containing water only

c)

an empty measuring cylinder and a ruler only

d)

a ruler only

12.

A measuring cylinder contains 10 cm^3 of water. A piece of steel is lowered into the measuring cylinder until it is fully submerged. The volume reading increases to 12 cm^3.


A second piece of steel is lowered into the measuring cylinder so that it is also fully submerged. The volume reading increases to 15 cm^3.


Which row shows the volumes of the two pieces of steel?

a)

Volume of first piece: 2 cm^3;

Volume of second piece: 3 cm^3

b)

Volume of first piece: 2 cm^3;

Volume of second piece: 5 cm^3

c)

Volume of first piece: 12 cm^3;

Volume of second piece: 3 cm^3

d)

Volume of first piece: 12 cm^3;

Volume of second piece: 15 cm^3

13.

The graph shows how the speed of an object changes with time.


How far does the object travel in 10 seconds?

a)

8 m

b)

10 m

c)

40 m

d)

80 m

14.

A car travels at an average speed of 60 km/h for 15 minutes.


How far does the car travel in 15 minutes?

a)

4.0 km

b)

15 km

c)

240 km

d)

900 km

15.

The graph shows the motion of a car for a five-second period.


Which answer is correct?

a)

The car is at rest at: 0.0 s;

The car is moving at a constant speed at: 2.0 s

b)

The car is at rest at: 0.0 s;

The car is moving at a constant speed at: 4.0 s

c)

The car is at rest at: 4.0 s;

The car is moving at a constant speed at: 0.0 s

d)

The car is at rest at: 4.0 s;

The car is moving at a constant speed at: 2.0 s

16.

An object begins to fall close to the Earth's surface. Air resistance can be ignored. Which statement about the object's acceleration is correct?

a)

The acceleration is constant.

b)

The acceleration decreases as the body falls.

c)

The acceleration increases as the body falls.

d)

The acceleration is zero.

17.

The diagrams below are distance-time graphs for four bodies.


Which body is moving with an increasing speed?

a)
b)
c)
d)
18.

A runner runs 300 m at an average speed of 3.0 m/s. She then runs another 300 m at an average speed of 6.0 m/s.


What is her average speed for the total distance of 600 m?

a)

2.0 m/s

b)

4.0 m/s

c)

4.5 m/s

d)

8.0 m/s

19.

The graph shows how the speed of an object varies with time. At which point on the graph is the greatest distance travelled per second?

a)

A

b)

B

c)

C

d)

D

20.

An athlete runs at a speed of 8 m/s for 10 s, and then at a speed of 6 m/s for 12 s.


Which calculation gives the average speed of the athlete in m/s?

a)

8 + 62\frac{8\ +\ 6}{2}

b)

(8⋅10)+(6⋅12)22\frac{\left(8\cdot10\right)+\left(6\cdot12\right)}{22}

c)

(8 ÷ 10)+(6 ÷ 12)22\frac{\left(8\ \div\ 10\right)+\left(6\ \div\ 12\right)}{22}

d)

(10 ÷ 8)+(12÷6)22\frac{\left(10\ \div\ 8\right)+\left(12\div6\right)}{22}

21.

A girl goes for a ride on her bicycle.


The diagram shows how her speed changes with time for part of her journey.


In which labelled section is she moving with constant speed?

a)

A

b)

B

c)

C

d)

D

22.

A boy runs 400 m at an average speed of 4.0 m/s.


He runs the first 200 m in 40 s.


How long does he take to run the second 200 m?

a)

60 s

b)

66.7 s

c)

80 s

d)

140 s

23.

a)

The acceleration is not constant.

b)

The acceleration is negative.

c)

The speed is decreasing.

d)

The velocity is constant.

24.

Which statement about acceleration is correct?

a)

It is related to the changing speed of an object.

b)

It is the distance an object travels in one second.

c)

It is the force acting on an object divided by the distance it travels in one second.

d)

It is the force acting on an object when it is near to the Earth.

25.
a)

Athlete P won the race and was 0.70 s ahead of the athlete in second place.

b)

Athlete P won the race and was 1.90 s ahead of the athlete in second place.

c)

Athlete S won the race and was 1.30 s ahead of the athlete in second place.

d)

Athlete S won the race and was 2.10 s ahead of the athlete in second place.

26.

Which statement correctly describes the effects of placing a heavy load in a car?

a)

It is easier to accelerate the car and easier to bring the car to rest.

b)

It is easier to accelerate the car but more difficult to bring the car to rest.

c)

It is more difficult to accelerate the car and more difficult to bring the car to rest.

d)

It is more difficult to accelerate the car but easier to bring the car to rest.

27.

A mass of 6.0 kg rests on the surface of a planet. On this planet, g = 20 N/kg.


What is the weight of the object?

a)

0.30 N

b)

0.60 N

c)

60 N

d)

120 N

28.

A space probe is taken from the Earth to Mars. The force of gravity on the surface of Mars is less than the force of gravity on the surface of the Earth.


How do the weight and the mass of a space probe on the surface of Mars compare to their values when the probe is on the surface of the Earth?

a)

Mars Weight: decreased; Mars mass: decreased

b)

Mars Weight: decreased; Mars mass: unchanged

c)

Mars Weight: unchanged; Mars mass: decreased

d)

Mars Weight: unchanged; Mars mass: unchanged

29.

A satellite orbits the Earth at constant speed in circular orbit. Which statement is correct?

a)

The resultant force on the satellite is zero.

b)

The resultant force on the satellite is towards the Earth.

c)

The resultant force on the satellite is away from the Earth.

d)

The resultant force on the satellite is in the direction of motion.

30.

Two forces P and Q act on an object. Which diagram shows the resultant of these two forces?

a)
b)
c)
d)
31.
a)

The acceleration of the ball decreases.

b)

The acceleration of the ball increases.

c)

The speed of the ball decreases.

d)

The gravitational force on the ball decreases.

32.

a)

The horizontal speed is greater on the Moon and the ball hits the floor 4.0 m in front of the spring.

b)

The horizontal speed is greater on the Moon and the ball hits the floor more than 4.0 m in front of the spring.

c)

The horizontal speed is the same on the Moon and the ball hits the floor 4.0 m in front of the spring.

d)

The horizontal speed is the same on the Moon and the ball hits the floor more than 4.0 m in front of the spring.

33.

Which choice describes speed and velocity?

a)

Speed: scalar | Velocity: scalar

b)

Speed: scalar | Velocity: vector

c)

Speed: vector | Velocity: scalar

d)

Speed: vector | Velocity: vector

34.

Four balls with different masses are dropped from the heights shown. Air resistance may be ignored. Which ball has the smallest average speed?

a)
b)
c)
d)
35.

An object of mass 2.0 kg is taken from the Earth, where the gravitational field strength is 10 N/kg, to the Moon, where the gravitational field strength is 1.6 N/kg.


Which row is correct?

a)

Earth weight: 0.20 N | Moon weight: 0.80 N

b)

Earth weight: 0.20 N | Moon weight: 3.2 N

c)

Earth weight: 20 N | Moon weight: 0.80 N

d)

Earth weight: 20 N | Moon weight: 3.2 N

36.

What is the best description of the meaning of the 'mass' of an object?

a)

the space occupied by the object

b)

the force that gravity exerts on the object

c)

the resistance of the object to changes in motion

d)

the closeness of packing of the molecules in the object

37.

A ball is thrown vertically upwards through the air. Air resistance acts on the ball. Which graph shows how its speed varies with time?

a)
b)
c)
d)
38.

An object is on the surface of the Earth. Which statement describes the weight of the object?

a)

the quantity of material that the object contains

b)

the quantity of space that the object takes up

c)

the gravitational force acting on the object

d)

the object's resistance to a change in its motion

39.

The gravitational field strength on the Earth is greater than the gravitational field strength on the Moon. The Earth has an atmosphere, but the Moon does not.


Which speed-time graph represents the motion of a light ball dropped from a great height near the surface of the Earth and near the surface of the Moon?

a)
b)
c)
d)
40.
a)

Force: decreases | Acceleration: decreases

b)

Force: decreases | Acceleration: increases

c)

Force: increases | Acceleration: decreases

d)

Force: increases | Acceleration: increases

41.
a)

6 cm

b)

10 cm

c)

26 cm

d)

30 cm

42.
a)

P + Q = R

b)

P + R = Q

c)

P = Q = R

d)

P = Q + R

43.
a)

0.53 m

b)

1.1 m

c)

1.9 m

d)

2.5 m

44.
a)

P equals Q

b)

P is less than Q

c)

(P x a) is equal to (Q x b)

d)

(P x a) is greater than (Q x (a + b))

45.

Which statement gives a complete description of any object that is in equilibrium?

a)

There are no forces acting.

b)

There is no resultant force.

c)

There is no resultant force and no resultant turning effect.

d)

There is no resultant turning effect.

46.

What is the unit of the moment of a force?

a)

N

b)

N/kg

c)

N/m

d)

Nm

47.
a)

80 N

b)

100 N

c)

180 N

d)

225 N

48.
a)

0.67 N

b)

4.0 N

c)

6.0 N

d)

9.0 N

49.
a)

moves towards the bottom of the page

b)

moves to the left

c)

moves to the right

d)

moves towards the top of the page

50.
a)

W/2

b)

W

c)

3W/2

d)

2W

51.
a)

0.60 g/cm^3

b)

0.67 g/cm^3

c)

1.5 g/cm^3

d)

1.7 g/cm^3

52.
a)

P: Falls

Q: Falls

b)

P: Falls

Q: Rises

c)

P: Rises

Q: Falls

d)

P: Rises

Q: Rises

53.
a)

P/1.3

b)

P

c)

1.3P

d)

1.7P

54.
a)

P

b)

Q

c)

R

d)

P, Q, and R produce the same pressure

55.
a)

0.5 cm

b)

2 cm

c)

50 cm

d)

200 cm

56.
a)

15 kg/m^3

b)

540 kg/m^3

c)

1500 kg/m^3

d)

54 000 kg/m^3

57.
a)

100 000 Pa

b)

500 000 Pa

c)

1 000 000 Pa

d)

5 000 000 Pa

58.
a)

Force at point: greater than flat surface

Pressure at point: greater than flat surface

b)

Force at point: greater than flat surface

Pressure at point: less than flat surface

c)

Force at point: same as flat surface

Pressure at point: greater than flat surface

d)

Force at point: same as flat surface

Pressure at point: less than flat surface

59.
a)

1.02 × 104 Pa1.02\ \times\ 10^4\ Pa  

b)

1.02 × 105 Pa1.02\ \times\ 10^5\ Pa  

c)

1.02 × 106 Pa1.02\ \times\ 10^6\ Pa  

d)

1.02 × 107 Pa1.02\ \times\ 10^7\ Pa  

60.

A mass bounces up and down on a steel spring. The diagram shows the mass and the spring at different points during the motion.

At which point does the mass have the least gravitational potential energy and at which point is the most elastic energy stored in the spring.

a)

Least GPE: Mass moving down

Most Elastic Energy: Mass moving up

b)

Least GPE: Mass moving down

Most Elastic Energy: Lowest point

c)

Least GPE: Lowest point

Most Elastic Energy: Mass moving up

d)

Least GPE: Lowest point

Most Elastic Energy: Lowest point

61.

Brakes are used to slow down a moving car.

Into which form of energy is most of the kinetic energy converted as the car slows down?

a)

Chemical

b)

Elastic

c)

Thermal

d)

Sound

62.

A box of mass 8.0 kg is lifted from the ground and placed on a shelf. The box gains 100 J of potential energy.

The box falls off the shelf. Air resistance can be ignored.

At what speed does the box hit the ground?

a)

3.5 m/s

b)

5.0 m/s

c)

25 m/s

d)

28 m/s

63.

The diagram shows part of a rollercoaster ride with the car at different positions.

The car runs freely down from position X to position Y and up the hill on the other side.

What happens to the kinetic energy and to the gravitational potential energy of the car as it moves from position X to position Y?

a)

KE: decreases

GPE: decreases

b)

KE: decreases

GPE: increases

c)

KE: increases

GPE: decreases

d)

KE: increases

GPE: increases

64.

A ball is at rest at the top of a hill. It rolls down the hill. At the bottom of the hill the ball hits a wall and stops.

Which energy changes occur?

a)

GPE -> Internal Energy -> KE

b)

GPE -> KE -> Internal Energy

c)

KE -> GPE -> Internal Energy

d)

KE -> Internal Energy -> GPE

65.

Electrical energy may be obtained from nuclear fission.

In which order is the energy transferred in this process?

a)

nuclear fuel -> generator -> reactor & boiler -> turbines

b)

nuclear fuel -> generator -> turbines -> reactor & boiler

c)

nuclear fuel -> reactor & boiler -> generator -> turbines

d)

nuclear fuel -> reactor & boiler -> turbines -> generator

66.

A car of mass 500 kg is moving at 10 m/s. The engine does work on the car and the speed increases to 16 m/s.

How much work is done by the engine to increase the speed of the car?

a)

3000 J

b)

9000 J

c)

39000 J

d)

78000 J

67.

A man carries 20 tiles from the ground to the roof of a house. Each tile has a mass of 1.2 kg. The roof of the house is 15 m above the ground.

How much work does the man do against gravity on the tiles in carrying them to the roof?

a)

36 J

b)

180 J

c)

360 J

d)

3600 J

68.

A car is moving along a straight horizontal road. The car has 1.6 MJ of kinetic energy. The car accelerates for 20 s until the kinetic energy of the car increases to 2.5 MJ.

What is the minimum average power developed by the car engine for this acceleration?

a)

45 W

b)

205 W

c)

45 kW

d)

205 kW

69.

A force of 25 N acts on an object. The work done by the force is 400 J.

How far does the object move in the direction of the force?

a)

6.3 cm

b)

16 cm

c)

16 m

d)

10 km

70.

A motor of power P exerts a force F on an object. The object moves a distance d during the time t that the force acts.

Which equation is used to calculate the time t?

a)

t = FPdt\ =\ \frac{F}{Pd}  

b)

t = FdPt\ =\ \frac{Fd}{P}  

c)

t = PdFt\ =\ \frac{Pd}{F}  

d)

t = PFdt\ =\ \frac{P}{Fd}  

71.

A scientist uses an electric motor to lift a load through a vertical distance of 2.0 m.

He then increases the input power to the motor and repeats the experiment. The efficiency of the motor does not change.

Which answer correctly describes the effect that this has on the useful work done lifting the load and the time taken to lift it?

a)

Work done: increases

Time take: decreases

b)

Work done: stays the same

Time take: decreases

c)

Work done: decreases

Time take: stays the same

d)

Work done: stays the same

Time take: stays the same

72.

A rope, connected to a pulley system and motor is used to lift different objects through different distances. The time taken to lift each object is the same. The diagrams are NOT to scale.

Which motor requires the greatest power?

a)
b)
c)
d)

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