Homework Help: Physics

Posted by Jason on Friday, January 13, 2012 at 10:43pm.

a car accelerates at a constant rate from zero to 26.7 m/s in 10 seconds and then slows to 19 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s^2 during the 15 seconds?

Physics - drwls, Saturday, January 14, 2012 at 1:33am
Avg. acceleration = (Velocity change)/time
= 19/15 = 1.27
-> 1.3 m/s^2 (rounding to nearest tenth)

Only the initial and final velocity matter when you want the average acceleration

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