ogaillard
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Just wondering how the answer to part ii is true as it's accelerating from 10m/s to 20m/s in 28s but the answer is less than 280m. Please explain, using a graph if you can.
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ogaillard
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Question and Answer.
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qwert7890
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(Original post by ogaillard)
Just wondering how the answer to part ii is true as it's accelerating from 10m/s to 20m/s in 28s but the answer is less than 280m. Please explain, using a graph if you can.
Your answer and working both are correct.

Why do you think the answer cannot be less than 280m? Do you feel that the acceleration must be greater than 10m/s??
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ogaillard
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S=ut
u>=10 (as a >=0)
t =28
so S >=280
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ogaillard
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The car is accelerating from 10m/s to 20m/s, so the minimum speed is 10m/s
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