Joseph is invetigating the relationship between energy and motion of an object. Joseph releases a ball onto a u shaped ramp and observes the rmotion of the ball as it rolls back and forth between sides 1 and 2. What is the energy in this system?

Atraffic cop has pulled over a speeder, only to discover that he has stopped a close friend. the police officer is torn, because his professional obligations demand that he punish the speeder, but his personal obligations suggest that he should give a friend a break. what is this called?