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HWProblemSet7

# HWProblemSet7 - Physics 211 Problem Set 7 Due Fri Last Name...

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Physics 211 Spring 2012 Syracuse University Homework Problem Set 7 p.1 Physics 211 Problem Set 7 Due Fri, 03/09/12 Last Name:___________________________________ First Name _______________ Workshop time or section:___________________TA name or Room # ___________ Please submit your homework on this sheet. If you need more space than is available, please attach additional sheets of paper. 1. A block of mass 5.0 kg is moving down a frictionless incline that makes an angle of 30 o with the horizontal. While the block is moving a distance of 2 m, a rope exerts a constant force of 15 N upward along the ramp. Throughout the problem use g=10 m/s 2 . (a) Draw all forces on the block. (b) Draw a vector to represent the net force on the block (label it clearly) and determine its magnitude. (c) Is the block speeding up or slowing down? Explain. (d) Find the work done by the net force ( net net W F s = • Δ arrowrightnosp arrowrightnosp ) Δ s=2 m m 30 o rope

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Physics 211 Spring 2012 Syracuse University Homework Problem Set 7 p.2 (e) Find the work done by each of the individual forces.
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