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A car accelerates at a constant rate from zero to 26.1 m/s in 10 seconds and...

A car accelerates at a constant rate from zero to 26.1 m/s in 10 seconds and then slows to 10.2 m/s in 5 seconds.

What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?

What was the acceleration during the first 10 seconds?

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