Penny is adjusting the position of a stand up piano of mass m p = 170 kg
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Question:
- Penny is adjusting the position of a stand up piano of mass mp = 170 kg in her living room. The piano is lp = 1.3 m in length. The piano is currently at an angle of p = 36 degrees to the wall. Penny wants to rotate the piano across the carpeted floor so that it is flat up against the wall. To move the piano, Penny pushes on it at the point furthest from the wall. This piano does not have wheels, so you can assume that the friction between the piano and the rug acts at the center of mass of the piano.
- a. The coefficient of kinetic friction between the carpet and the piano is k = 0.27. Once the piano starts moving, calculate the torque p in Nm that Penny needs to apply to keep moving the piano at a constant angular velocity.
- b. Calculate the amount of work Wp in J Penny does on the piano as she rotates it.
Related Book For
University Physics with Modern Physics
ISBN: 978-0321501219
12th Edition
Authors: Hugh D. Young, Roger A. Freedman, Lewis Ford
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