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The table shows the total stopping distance for a car when driven at different speeds - Edexcel - GCSE Biology - Question 2 - 2018 - Paper 1
Question 2
The table shows the total stopping distance for a car when driven at different speeds. | speed / mph | reaction distance / metres | braking distance / metres | tota... show full transcript
Worked Solution & Example Answer:The table shows the total stopping distance for a car when driven at different speeds - Edexcel - GCSE Biology - Question 2 - 2018 - Paper 1
Step 1
Calculate how many times greater the total stopping distance is at 60 mph than at 20 mph.
Answer
To find how many times greater the total stopping distance is at 60 mph compared to 20 mph:
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From the table, the total stopping distance at 60 mph is 75 metres.
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The total stopping distance at 20 mph is 12 metres.
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Now, we perform the calculation:
Thus, the total stopping distance is 6.25 times greater at 60 mph than at 20 mph.
Step 2
Complete the sentence by putting a cross (X) in the box next to your answer.
Answer
The estimated total stopping distance in metres for a car driven at 80 mph would be between:
- A 95 m – 105 m
- B 110 m – 120 m
- C 130 m – 135 m
- D 150 m – 160 m
Based on the pattern of increasing stopping distances, option C is the most reasonable estimate for 80 mph.