physics
posted by wes .
A car accelerates at a constant rate from zero to 37.8 m/s in 10 seconds and then slows to 13.5 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?

physics 
drwls
Average acceleration
= (velocity change)/(time interval)
= (13.5 m/s)/15 s = 0.9 m/s^2
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