Problema Solution
The driver of a 1500 kg car slams on the brakes locking the wheels. A total retarding force of 1800 N acts to stop the car in a distance of 70m. How much work is done in bringing the car to a halt? Is the work done on or by the car?
Answer provided by our tutors
The work done = F*S = 1800N* 70m = 126,000 J
This is a negative work, so the work is done on the car