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Maths AS level mech

Just wondering how the answer to part ii is true its going from 10m/s to 20m/s in 28 secs but less than 280m. Please explain, use a graph if you can.
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Original post by ogaillard
Just wondering how the answer to part ii is true its going from 10m/s to 20m/s in 28 secs but less than 280m. Please explain, use a graph if you can.

It helps to post the question and your working.
Reply 2
image wasn't working for some reason moved to a dif thread

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