A car is travelling along a straight road - Edexcel - GCSE Physics - Question 3 - 2017 - Paper 1
Question 3
A car is travelling along a straight road.
a) (i) The driver has to brake suddenly.
The thinking distance is 18 m and the braking distance is 55 m.
Calculate the s... show full transcript
Worked Solution & Example Answer:A car is travelling along a straight road - Edexcel - GCSE Physics - Question 3 - 2017 - Paper 1
Step 1
Calculate the stopping distance of the car.
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Answer
The stopping distance is the sum of the thinking distance and the braking distance. Thus:
Therefore, the stopping distance of the car is 73 meters.
Step 2
State one factor that could increase the driver’s reaction time.
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Answer
One factor that could increase the driver’s reaction time is distraction, such as using a mobile phone while driving.
Step 3
State one factor that could increase the braking distance of the car.
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Answer
One factor that could increase the braking distance of the car is carrying a heavy load, which increases the vehicle's mass.
Step 4
Complete the sentence by putting a cross (X) in a box next to your answer.
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Answer
The correct option is:
☐ a) decreasing the kinetic energy of the car
☑ b) increasing the time a resultant force acts on the driver
☐ c) decreasing the driver’s thinking time
☐ d) increasing the rate of change of momentum of the driver
