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Problem 2 (25 pts) 10 kg A cart of mass 10 kg has velocity of 9 m/s at the top of a ramp. At the end of the ramp its velocity is 7 m/s. Find the work done by the drag force if the friction coefficient is u = 0.53, the length of the ramp is 20 m, the ramp makes an angle a = 30 with the horizontal. 20 m a = 30 0