Consider a bicycle wheel that initially is not rotating. A block of mass m is attached to the wheel and is allowed to fall a distance h. Assume that the wheel has a moment of inertia I about its rotation axis.(adsbygoogle = window.adsbygoogle || []).push({});

Consider the case that the string tied to the block is attached to the outside of the wheel, at a radius r_A. Find omega_A, the angular speed of the wheel after the block has fallen a distance h, for this case.

Express omega_A in terms of m, g, h, r_A, and I.

Now consider the case that the string tied to the block is wrapped around a smaller inside axle of the wheel of radius r_B View Figure . Find omega_B, the angular speed of the wheel after the block has fallen a distance h, for this case.

Express omega_B in terms of m, g, h, r_B, and I.

Someone told me that I have incorporate torque into it. I initially thought that you needed to use the conservation of energy, etc. Any help would be great.

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# Homework Help: Wheel and angular velocity

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