Figure 3 shows a cyclist on a bicycle - AQA - GCSE Physics - Question 2 - 2021 - Paper 1
Question 2
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
The correct answer is Friction. This force opposes the motion of the cyclist moving forward.
Step 2
What is force B?
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Answer
The correct answer is Air resistance. This is the drag force acting against the cyclist's motion.
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
The relationship is A = B. When moving at constant velocity, the forces are balanced.
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 formula for moment:
extMoment=extforceimesextdistance
Substituting the values:
extMoment=150extNimes0.24extm=36extNm
Step 5
Complete the sentence.
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Answer
The correct answer to fill in the blank is chain. 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
An arrow should be drawn from the home location pointing towards the school location to indicate the displacement of the cyclist.
