Work-Energy Concepts
For each of the following statements, determine whether it is true or false.
True: The work done by the frictional force can be positive.
False: If the moon revolves around the earth in a perfectly circular orbit, then the earth does do work on the moon.
True: A centripetal force can never do work on an object.
False: The normal force can never do work on an object.
False: The kinetic energy does not depend on the reference frame of the observer.
True: The work done by the frictional force can be positive.
False: If the moon revolves around the earth in a perfectly circular orbit, then the earth does do work on the moon.
True: A centripetal force can never do work on an object.
False: The normal force can never do work on an object.
False: The kinetic energy does not depend on the reference frame of the observer.