Posted by **alice** on Wednesday, December 12, 2012 at 10:11pm.

A 4.2 × 10^3

kg car accelerates from rest at

the top of a driveway that is sloped at an angle of 18.4◦

with the horizontal. An average

frictional force of 4.1×10^3 N impedes the car’s

motion so that the car’s speed at the bottom of the driveway is 4.9 m/s.

The acceleration of gravity is 9.81 m/s^2.

What is the length of the driveway?

Answer in units of m

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