Cambridge Primary (1-6). Stage 5. Science. Learner's Book - Unit 5: Forces and magnetism

Question 1

Is gravity a pull or a push force? Give an example.

Question 3

What forces can you see in the photograph of the boys playing football?

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Question 4

How do we show forces on a force diagram?

Question 5

How do we show the direction of the force?

Question 7

Here is a force diagram of a person sitting on a chair. Which forces do the arrows show?

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Question 8

When you stand still, why don’t you sink into the ground? Draw a force diagram to explain your answer. Label gravity and normal force.

Question 9

For each picture, A, B and D: Identify the movement as a push or a pull or both.

Picture A:

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Question 10

For each picture, A, B and D: Identify the movement as a push or a pull or both.

Picture B:

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Question 11

For each picture, A, B and D: Identify the movement as a push or a pull or both.

Picture D:

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Question 12

For each picture, A, B and D: How do you know these are all applied forces?

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Copy and complete these sentences about picture C:

Zara __________ down on the bike’s pedals. This is an __________ force. This movement pulls the chain, which is another __________ force. This moves the bike’s __________.

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Question 14

Describe how you use an applied force to get up off your chair.

Question 15

This photograph shows a tropical cyclone near the coast of Australia. It was taken by a satellite that was made by people and put into space.

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What is a satellite?

Question 16

This photograph shows a tropical cyclone near the coast of Australia. It was taken by a satellite that was made by people and put into space.

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Explain why the Moon is a natural satellite.

Question 17

Look at this model of the Moon orbiting the Earth. Point to the Earth. Point to the Moon. Point to the Moon’s orbit around the Earth.

Find the green arrow. The green arrow shows the force of gravity the Moon exerts on the Earth. Remember gravity is a pulling force so the Moon is pulling the Earth. That is why the arrow points towards the Moon.

Find the red arrow. The red arrow shows the force of gravity the Earth exerts on the Moon.

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