Name: ______________________
Quiz 3
02/22/2005
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?