Physics, Please help!!!
posted by Siri .
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?

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.