# Exam2Sum11b - Name Physics 1025 Exam 2 MDC-IAC 1(20pts...

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Name____________________________ July 05, 2011 Physics 1025 Exam 2, MDC-IAC 1) (20pts.) Determine how much force is required to pull the free rope end, in order to lift the block in each case below. The end of each rope is indicated by an arrowhead. There is only one free rope end in each case. Thick lines are only points of attachment. You must show your work below (how each advantage is added or multiplied to determine a final mechanical advantage). C A Ans: 72N B Ans: 72N Ans: 72N D Ans: 72N

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Name____________________________ July 05, 2011 Physics 1025 Exam 2, MDC-IAC 2) (20pts.) a. Use vector analysis on the block on the incline below to determine if this system represents a static or a dynamic case when M 1 = 15kg, M 2 = 4kg, and M 3 = 6kg (no credit will be given for guessing one or the other, you must show all work). If dynamic give the direction (left or right of pulley) and magnitude of acceleration. b. Determine the tension (T) in the cable between M2 and M3. T M 2 M 3 M 1 30 o
Name____________________________ July 05, 2011 Physics 1025 Exam 2, MDC-IAC 3) (20pts.) Car A is travelling from the left, horizontally, with a velocity of 20m/s. Car B is travelling

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