A skydiver jumps out of a plane. Describe how gravitational potential energy changes as the skydiver falls. Describe how the skydivers kinetic energy changes when the parachute opens.

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.