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Figure 3 shows a cyclist on a bicycle - AQA - GCSE Physics - Question 2 - 2021 - Paper 1

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Figure 3 shows a cyclist on a bicycle. The cyclist is moving at a constant velocity. Arrows A and B represent the horizontal forces acting on the bicycle and cycli... show full transcript

Worked Solution & Example Answer:Figure 3 shows a cyclist on a bicycle - AQA - GCSE Physics - Question 2 - 2021 - Paper 1

Step 1

What is force A?

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Answer

Force A represents friction, which opposes the motion of the bicycle.

Step 2

What is force B?

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Answer

Force B refers to air resistance, which acts against the direction of travel of the cyclist.

Step 3

What is the relationship between force A and force B when the cyclist travels at a constant velocity?

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Answer

When traveling at constant velocity, the forces are balanced, so A = B.

Step 4

Calculate the moment about the pivot caused by the force applied to the pedal in Figure 4.

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Answer

Using the equation: moment = force × distance, we calculate: moment = 150 N × 0.24 m = 36 Nm.

Step 5

Complete the sentence.

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Answer

The force from the cyclist pushing down on the pedal is transmitted to the back wheel by the chain.

Step 6

Draw an arrow on Figure 7 to show the displacement of the cyclist.

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Answer

A straight arrow is drawn from home to school, indicating the direction of the displacement.

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