Physics

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14 March, 01:36

A bicycle wheel is mounted on a fixed, frictionless axle, with a light string wound around its rim. The wheel has moment of inertia I=kmr2, where m is its mass, r is its radius, and k is a dimensionless constant between zero and one. The wheel is rotating counterclockwise with angular speed ω0_0, when at time t=0 someone starts pulling the string with a force of magnitude F. Assume that the string does not slip on the wheel.

The force F pulling the string is constant; therefore the magnitude of the angular acceleration α of the wheel is constant for this configuration. 1. Find the magnitude of the angular velocity ω of the wheel when the string has been pulled a distance d. 2. Express the angular velocity ω of the wheel in terms of the displacement d, the magnitude F of the applied force, and the moment of inertia of the wheel Iw.