Name: ______________________


Quiz 3


Ch. 4.1-4


1)      The engine of a 1300kg racecar provides a time dependent force of .  At t=0 the car is at rest at.  Where is the car after 10s?











2)      A 5kg rock is falling under gravity.  After a few seconds it reaches a constant velocity due to the force of air friction.

a)      What is the net force on the rock?

b)      What is the force of friction?