A 60 kg diver jumps off of a 10 m platform with an upward vertical velocity of 2 m/s. Assume that her reference height at takeoff is 10 m and just before entry into the water the reference height is 0 m.
(a) What are her kinetic energy, potential energy and total mechanical energy just after takeoff?
(b) While she is in the air, does her total mechanical energy remain constant?
(c) What are her kinetic energy, potential energy and total mechanical energy just before entry into the water?