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OCR GCSE Combined Science

Topic questions Forces Resultant forces

Resultant forces

9 questions · 62 marks · about 1 hour

Resultant forces questions

TopicResultant forces

OCR J250 Resultant forces 9 questions

Physics Paper 11 June 2025 Higher tier, Question 16 10 marks

A student is investigating how force affects acceleration. They set up this apparatus.

Figure for question 16
(a)

Explain how they should use this apparatus to find acceleration.

Include any extra equipment they need.

[4]
Reveal mark scheme Mark scheme for question 16(a)
(b)
(b)(i)

Two forces act to reduce the acceleration of the car.

One of these forces is air resistance.

Name the other force.

[1]
Reveal mark scheme Mark scheme for question 16(b)(i)
(b)(ii)

Suggest how the teacher can reduce the effect of this other force.

[1]
Reveal mark scheme Mark scheme for question 16(b)(ii)
(c)

The table shows the student’s results.

Force applied to car (N)Acceleration of car (m / s2)
0.300.51
0.601.02
0.901.53

Suggest two changes the student could make to improve the validity of their results.

[2]
Reveal mark scheme Mark scheme for question 16(c)
(d)

Predict the acceleration if a force of 1.2 N was applied to the car.

Use data from the table.

Acceleration =........ m / s2

[1]
Reveal mark scheme Mark scheme for question 16(d)
(e)

Mass is an example of a quantity which has a magnitude, but no direction.

What scientific term is used for this type of quantity?

[1]
Reveal mark scheme Mark scheme for question 16(e)

Physics Paper 11 June 2023 Higher tier, Question 9 1 mark

The diagram shows some forces acting on an object.

Figure for question 9

What is the resultant force on the object?

A 5.4 N

B 12 N

C 13 N

D 14.9 N

Question 9, shown as an image
[1]
Reveal mark scheme Mark scheme for question 9

Physics Paper 11 June 2022 Higher tier, Question 1 1 mark

The diagram shows some forces acting on a toy car.

Figure for question 1

Which row of the table describes the motion of the toy car?

Figure for question 1
Question 1, shown as an image
[1]
Reveal mark scheme Mark scheme for question 1

Physics Paper 11 June 2022 Higher tier, Question 10 1 mark

A child uses a force of 10 N at an angle of 60° to push a toy car. This is a scale diagram of the force:

Figure for question 10

What is the horizontal component of the force pushing the toy car? Use the scale diagram.

A 3.2 N

B 5 N

C 8.7 N

D 10 N

Question 10, shown as an image
[1]
Reveal mark scheme Mark scheme for question 10

Physics Paper 11 November 2021 Higher tier, Question 14 11 marks

This is a picture of a ball on a field.

Figure for question 14
(a)

Draw a free-body force diagram for the ball.

[2]
Reveal mark scheme Mark scheme for question 14(a)
(b)(i)

The ball is stationary on the field. Explain why using Newton’s laws.

[1]
Reveal mark scheme Mark scheme for question 14(b)(i)
(b)(ii)

Student A kicks the ball with their toes.

This hurts the student’s toes. Explain why using Newton’s laws.

[3]
Reveal mark scheme Mark scheme for question 14(b)(ii)
(c)(i)

Student A kicks the ball.

Their boot is in contact with the ball for 0.05 s.

The velocity of the ball increases by 25 m / s.

Calculate the acceleration of the ball.

Use the equation: acceleration = change in velocity / time

Acceleration =........ m / s2

[2]
Reveal mark scheme Mark scheme for question 14(c)(i)
(c)(ii)

Student B kicks the ball with a force of 216 N.

The mass of the ball is 0.45 kg.

Calculate the acceleration of the ball.

Use the equation: force = mass × acceleration

Acceleration =........ m / s2

[3]
Reveal mark scheme Mark scheme for question 14(c)(ii)

Physics Paper 12 November 2020 Higher tier, Question 13 14 marks

This question is about sound, light and water waves.

(a)

State one difference between sound waves and light waves.

[1]
Reveal mark scheme Mark scheme for question 13(a)
(b)

In Fig. 13.1, a student makes waves in a tray of water. He places a cork at position A.

Figure for question 13
(b)(i)

Fig. 13.2 shows a free-body force diagram for the cork.

Figure for question 13

At position A in Fig. 13.1, the cork starts to move up.

Use the free-body force diagram to explain why.

[1]
Reveal mark scheme Mark scheme for question 13(b)(i)
(b)(ii)

Explain how this experiment shows that the wave travels but not the water.

[1]
Reveal mark scheme Mark scheme for question 13(b)(ii)
(c)

A teacher uses a signal generator to produce a sound wave.

Fig. 13.3 shows the sound wave on the oscilloscope screen.

Figure for question 13

1 cm represents 0.005 s on the horizontal scale.

(c)(i)

Calculate the period of the sound wave.

[1]
Reveal mark scheme Mark scheme for question 13(c)(i)
(c)(ii)

Calculate the frequency of the sound wave.

[3]
Reveal mark scheme Mark scheme for question 13(c)(ii)
(d)

Fig. 13.4 shows the experiment a teacher does to measure the speed of sound.

She uses two microphones and a speaker.

Figure for question 13

• The speaker is connected to a signal generator.

• The speaker emits sound with a frequency of 1200 Hz.

• Microphone 2 is moved 0.29 m to the right of microphone 1.

• The traces on the oscilloscope screen are one wavelength apart.

(d)(i)

Calculate the wave speed of sound.

Wave speed =........ m / s

[3]
Reveal mark scheme Mark scheme for question 13(d)(i)
(d)(ii)

Suggest how this experiment can be improved.

[1]
Reveal mark scheme Mark scheme for question 13(d)(ii)
(d)(iii)

The speed of sound can also be calculated using echoes and a large wall.

Explain how.

[3]
Reveal mark scheme Mark scheme for question 13(d)(iii)

Physics Paper 11 June 2019 Higher tier, Question 12 11 marks

(a)

A student has two metal cubes, A and B, as shown in Fig. 12.1.

Figure for question 12

Each side of metal cube A is 1.0 cm. Each side of metal cube B is 2.0 cm.

Both metal cubes have the same mass. The density of metal cube A is 16 g / cm3.

(a)(i)

Calculate the density of metal cube B.

Use the equation: density = mass ÷ volume

Density =........ g / cm3

[3]
Reveal mark scheme Mark scheme for question 12(a)(i)
(a)(ii)

Metal cube A sinks when placed in water.

Explain why.

[1]
Reveal mark scheme Mark scheme for question 12(a)(ii)
(b)
Figure for question 12
(b)(i)
Figure for question 12 Figure for question 12
[2]
Reveal mark scheme Mark scheme for question 12(b)(i)
(b)(ii)

The resultant force on the spring is zero.

Explain why.

Use your answer to 12(b)(i) to help you.

[1]
Reveal mark scheme Mark scheme for question 12(b)(ii)
(b)(iii)

More than one force is required to stretch the spring.

Describe what happens if only one force is applied.

[1]
Reveal mark scheme Mark scheme for question 12(b)(iii)
(b)(iv)

The student removes cube A and places another cube, cube C, on the spring.

The extension of the spring due to cube C is 0.04 m.

The spring constant of the spring is 30 N / m.

Calculate the weight of cube C.

[3]
Reveal mark scheme Mark scheme for question 12(b)(iv)

Physics Paper 11 June 2018 Higher tier, Question 14 7 marks

(a)

Objects in freefall eventually reach terminal velocity.

Draw a labelled diagram to show the forces acting on an object when it is falling at terminal velocity.

[3]
Reveal mark scheme Mark scheme for question 14(a)
(b)

A student measures two forces.

The forces are 5.0 N and 3.0 N. The forces act at 90° to each other.

Draw a scale drawing to determine the resultant force.

[3]
Reveal mark scheme Mark scheme for question 14(b)
(c)

An object travelling in a circle at a constant speed has a changing velocity.

State why.

[1]
Reveal mark scheme Mark scheme for question 14(c)

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