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August 29, 2014

Homework Help: Physics

Posted by Natasha on Monday, March 12, 2012 at 8:13pm.

A 1100-kg car is being driven up a 4.0 hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 518 N. A force is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act on the car: its weight and the normal force Fn directed perpendicular to the road surface. The length of the road up the hill is 310 m. What should be the magnitude of F , so that the net work done by all the forces acting on the car is +140 kJ?

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