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October 21, 2014

Homework Help: AP physics

Posted by Alica on Thursday, May 10, 2012 at 8:45pm.

A 1280-kg car starts from rest and accelerates to 80 km/h in 23.0 s. Friction exerts an average force of 449 N on the car during this time.
(a) What is the net work done on the car?
J
(b) How far does the car move during its acceleration?
m
(c) What is the net force exerted on the car during this time?
N
(d) What is the forward force exerted on the car as a result of the engine, power train, and wheels pushing backward on the road?

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