A rotating uniform cylindrical platform of mass 220 kg and radius 5.5 slows down from 3.8 rev/s to rest in 16s when the driving motor is disconnected. Estimate the power output of the motor required to maintain a steady speed of 3.8rev/s.

The california mussel (mytilus californianus) attaches itself to a rock or other solid surface with a bundle of filaments known as the byssus. imagine that 15.0 j of work is done to stretch the distal end of the byssus. it releases 10.8 j of thermal energy as it relaxes. what is the resilience of the distal end of the byssus?

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

What is the difference between mass density and weight density?