At the top of a giant swim on the gymnastics high bar, a gymnast’s velocity is 1 m/s, and the gymnast is 3.5 m high. If the gymnast’s mass is 50kg, what is the total mechanical energy at this instant? (Show all work)

A student with a mass of 50.0 kg climbs a vertical staircase in 28.5 seconds. If the staircase has 14.0 steps and each step is 22.5 cm high, calculate his power output. (Answer to 1 decimal place) Your Answer: Answer units

A force of magnitude 60 N stretches a certain spring by 0.25 m from its equilibrium position. What is the force constant of this spring? Show work, +5 Force constant of the spring = N/m How much elastic potential energy is stored in this spring when it is stretched 0.5 m from its equilibrium position? (Use the force constant found above). Elastic PE =

If the rock loses half of it's potential energy at 30 meters is seems reasonable that it would lose the rest in another 30?  Thus the cliff is 60 m?   How, with Eg + Ek would that be shown?  (Assuming that I am right)  If not, what is the correct answer and how would it be found?  Thanks