As Maria and Carla stood in the kitchen talking, a car drove by the house. The music was blaring so loudly thatMaria commented: "that loud music makes it seem like my heart is beating with he music!" Well, something is beating with the music, " shouted Carl. "Look at the windows!" The windows in the kitchen were vibrating to the beat of the music from the car.

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)