Needless to say, the greedy superintendent was fired for cause. Realizing that i

Question

Needless to say, the greedy superintendent was fired for cause. Realizing that it is possible for the cable to break in the future just due to normal wear, the mine owner installs a coal car bumper at the bottom incline.

A) Determine the required spring constant in order to stop a fully loaded ( determined in the url link below ) coal car in the 10 meters if the fully loaded coal car breaks free at the top of the incline.

http://www.chegg.com/homework-help/questions-and-answers/coal-moved-conveyer-belt-coal-hopper-coal-car-shown-diagram-conveyer-belt-wheel-diameter-2-q4009087

Explanation / Answer

form conservation of energy :::

mV^2/2 = k*10^2/2 - mg*10*sin(theta)

K = [mV^2 + 10mg*sin(theta)]/50

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