Hello , please tell me which choices are correct? THE PROBLEM Suppose you have t

Question

Hello , please tell me which choices are correct?

THE PROBLEM Suppose you have two bicycle wheels. Each one has a rotational inertia of 1-0.29 m2kg. Let's attach one to the floor so that its axle is vertical. You can then stand on this wheel (carefully) with one foot on each side of the axle. Someone could apply a torque and you would rotate, but we'll begin with you standing still on the wheel and not rotating A friend will hold the second wheel with its axle vertical and make that wheel spin at 144 rpm. Your friend will then hand this spinning wheel to you. Let's say you hold its axle directly above the axle of the wheel that you are standing on. If you turn the spinning wheel upside down, then you will begin to rotate. Suppose this rotation rate is a)2-68 rpm. (a) Approximating yourself to be a cylinder of radius r=14 cm, calculate your mass. (b) How much work did you do to turn the wheel upside down? PAPER SOLUTION INTERPRET ldentify all of the true statements. A. When a spinning bicycle wheel is turned upside down, its angular momentum gets multiplied by-1 B. Angular momentum is conserved because there are no external forces. C. When a spinning bicycle wheel is turned upside down, its angular momentum does not change D. To answer these questions, we must assume friction is negligible in the bicycle wheels. E. Angular momentum is conserved because there are no external torques. F. When a spinning bicycle wheel is turned upside down, its angular momentum becomes zero. G. Work is the change in kinetic energy H. There are external torques. I. There are external forces. J. None of the above. DEVELOP EVALLIATE

Explanation / Answer

TRUE Answers are as below :

(A)

(D)

(E)

(G)

(I)

Other Answers are FALSE.................

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