Posted by **Siri** on Wednesday, September 2, 2009 at 10:54pm.

A car accelerates at a constant rate from zero to 32.6 m/s in 10 seconds and then slows to 14.8 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 in the previous problem?

- Physics, Please help!!! -
**drwls**, Thursday, September 3, 2009 at 1:17am
The average acceleration is the net velocity change divided by the time interval. For your first question, that would be 14.8 m/s divided by 15 s, which rounds off to 1.0 m/s^2.

For your second question, the answer is 32.6 m/s divided by 10 s.

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