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Physics50Exam3W11

# Physics50Exam3W11 - 3 e Find the tension in the rope if F =...

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DO NOT TURN THIS PAGE!!!! NAME: _________________________________________ PHYSICS 50 WINTER 2011 EXAM 3 MAKE SURE TO SHOW ALL WORK IN COMPLETE DETAIL. NO CREDIT WILL BE GIVEN IF NO WORK IS SHOWN!!!!!

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1 1. For the system shown below assume a massless, frictionless pulley. Take the coefficient of kinetic friction to be 0.2. (10 pts) a) Calculate the acceleration of the blocks. b) Calculate the tension in the string. c) Determine which direction the 17.0 kg mass moves. 17.0 kg 30 o
2 d) A 24-kg child stands on a merry-go-round making 1rotation in 5.0 s. He is standing 1.5 m away from the axis of rotation. a) Calculate the frictional force on the child. b) If the child begins to slide when r = 1.9 m, calculate the coefficient of static friction.

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