Two solid discs are linked with a belt. The diameter of the larger disc is twice as large as the diameter of the small disc. If the small disc is rotating at 500 revolutions per minute (rpm), what is the rotational speed of the large disc? Express your answer in rpm and in radians. 

Estimate the angular acceleration of a small pebble stuck to a bicyle tire as the bicycle accelerates from rest to 10 mph (4.47 m/s) in 2 seconds.

A book can be rotated about many different axes. The moment of inertia of the book will depend upon the axis chosen. Rank the choices A to C above in order of increasing moments of inertia.

A hoop and a solid disc are released from rest at the top of an incline and allowed to roll down the incline without slipping. 
Which is correct?