Question

A 2,000 kg car reaches the top of a 100 meter hill at A with a speed vA = 40 m/s as shown in the figure below. A hill B is shown in the figure to the right of hill A. (a) Assume there is no frictional loss of energy between the car and the hills. What is the speed of the car (vB) when it gets to the top of the 150 meter hill at B? PHYS 201-001 Summer 2020 3 (b) Assume now that there is another larger hill located to the right of B. In terms of vertical distance, how far up hill C will the car go (HC) before it momentarily stops? For this problem, there is no friction ? (c) Now we are going to assume there are frictional losses between the hills and the car. What is the speed vB at the top of the 150 m high hill at B if all sources of friction do work equal to −500,000 J on the car as it coasts in neutral from A to B? Remember the lost frictional work is equal to the amount of energy the car will lose because of friction during the trip

Answer 1