1. Consider a pendulum swinging to and fro. At what point in its motion is the KE of the pendulum bob at a maximum? At what point is its PE at a maximum? When the pendulum’s KE is half its maximum...

1. Consider a pendulum swinging to and fro. At what point in its motion is the KE of the pendulum bob at a maximum? At what point is its PE at a maximum? When the pendulum’s KE is half its maximum value, how much PE does it have?

2. Why is it difficult for a firefighter to hold a hose that ejects large quantities of water at high speed?