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.
(i) The driver has to brake suddenly.
The thinking distance is 18 m and the braking distance is 55 m.
Calculate the stop... 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 of a car is the sum of the thinking distance and the braking distance. Here, the thinking distance is 18 m and the braking distance is 55 m.
Therefore, the stopping distance can be calculated as follows:
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 tiredness or distraction. This could include things like lack of sleep, being under the influence of medication or alcohol, or using mobile phones 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 or increased weight in the car. This extra weight requires more force and distance to bring the car to a stop.
Step 4
Complete the sentence by putting a cross (X) in a box next to your answer.
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Answer
The correct completion for the sentence is the option:
B increasing the time a resultant force acts on the driver.
This is because air bags work by allowing the driver to decelerate more gradually in a collision, thus reducing the risk of injury.
