301 (S99) Exam #2

301 (S99) Exam #2 - Physics 301 (Spring 1999) Second Exam...

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(Spring 1999) Second Exam (February 26, 1999) Name 1. [25 points total] A skier of mass m = 50 kg starts from rest at point A and skis down a hill and then up a smaller hill having radius of curvature R = 20 m. The skier is testing some new Frictionless Skis which are (strangely enough) entirely frictionless. Assume g 10 m/s 2 . C m = 50 kg B A R = 20 m 25 m A. [3 pts] Find the work (if any) done by the snow on the skier with the Frictionless Skis as she moves from point A to point C . Explain your reasoning. B. [6 pts] Find the kinetic energy of the skier at point B . Show your work. C. [6 pts] Find the speed of the skier at point C . Show your work. D. [4 pts] Find the acceleration of the skier (magnitude and direction) at point C . Show your work. (Note: If you did not find an answer to part C, use v = 12 m/s.) E. [6 pts] Find the magnitude of the normal force by the hill on the skier at point C . Show your work. (Note:
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301 (S99) Exam #2 - Physics 301 (Spring 1999) Second Exam...

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