a cylinder ( I = .5 mr^2) rolls along a level floor with aspeed v. The work requ

Question

a cylinder ( I = .5 mr^2) rolls along a level floor with aspeed v. The work required to stop this cylinder is (a) 1/4 mv^2(b) 1/2 mv^2 (c) 3/4 mv^2 (d) mv^2 (e) 1.25mv^2

A spinning bicycle wheel with a loaded rim ( essentially a hoop) issupported by a line at one end of its axle. The radius of the wheelis 0.305 m, and the wheel has a mass of 3.63 kg. It isspinning at 80.0 rad/s, and the center of mass is 15.2 cm from thepoint of support. The angular velocity of precession is (a) 0.0125rad/s (B) 0.0318 rad/s (c) .200 rad/s (d) .100 rad/s (e) .625rad/s

A merry-go round with a moment of inertia of 6.78 x 10 ^ 3 kg permeters squared is coasting at 2.20 rad/s. When a 72.6 kg man stepsonto the rim, the angular velocity decreases to 2.0 rad/s. The radius of the merry-go-round is (a) 3.06 m (b) 3.66 m (c) 4.27m (d) 4.88 m (e) 5.49 m

Explanation / Answer

What was the final answer for part 2? It looks like you got160 rad/s but that was not one of the choices. Also, can youexplain what you mean a little more for the third part? Didyou mean to use the kinetic energy equation to find mass or whatdid you mean?

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