Assume that a person bouncing a ball represents a closed system. which statement best describes how the amounts of the ball's potential and kinetic energy change?
a. both the kinetic and potential energy of the ball increase
b. the ball's potential energy decreases as it rises and it's kinetic energy increases
c. the ball's kinetic energy increases as it falls and its potential energy decreases
d. both the kinetic and potential energy of the ball decrease

me asap this is important

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these