Physics 211 Spring 2009 Syracuse University Homework Problem Set 11 p.1
Physics 211 Problem Set 11 Due Wed, 04/08/09
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1. Find the net torque on the wheel shown below about the axle through O if a=10cm and
b=25cm.
(Hints: One of the quantities given in the figure is not needed. Pay attention to relative
signs of torques from individual forces).
2. Assume that the wheel in the previous problem consists of two solid and uniform
cylinders fused together by sides. The smaller cylinder (with radius a) has a mass of 2
kg. The larger cylinder (with radius b) has a mass of 5 kg. Find angular acceleration of
the wheel.
(Hints: Figure out moment of inertia of the wheel and use Newton’s 2nd law in angular
form)
