What is the power output for a 60kg person who climbs a 5 m high staircase in 15 s

How much power is needed to push a 1100 kg piano up a 4.0 meter ramp into a truck bed that is 1.5 meters off the ground in 10.0 seconds. The coefficient of friction between the ramp and the piano is 0.32

The power source for a non-electric grandfather clock is a 12.0 kg weight that hangs by a chain and slowly falls 0.750 m every week as the pulling force runs the clock.  At the end of each week, the owner pulls the mass up back to the top and the clock runs for another week.  What is the average power required to run the clock? (1 mW = 10^-3 Watts,  1 µW = 10^-6 Watts)

When an 81.0 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.00×10³ J. By how much does the potential energy of a 18.0 kg child increase when the child climbs a normal staircase to the second floor?

What is your average power if you lift a 36.1 kg box at a constant speed to a height of 1.31 m in 7.87 s?

A 715-N Marine in basic training climbs a 10.5-m vertical rope at a constant speed in 6.00 s. What is his power output?

A truck weighing 3.0 x 10^4 newtons was driven up a hill that is 1.6 x 10^3 meters long to anarea that is 8.0 x 10^2 meter above the starting point.  If the trip took 480 seconds, what was the minimum power required?

A 1.00 kg object is dropped from a height of 10.0m and loses 20.0 J of energy due to air resistance as it falls. What is its speed just before it hits the ground?

A 2.00 kg object is dropped from a height of 20.0m and loses 25.0 J of energy due to air resistance as it falls. What is its speed just before it hits the ground?

It takes 87 J of work to stretch an ideal spring from 1.4 m to 2.9 m from equilibrium. What is the value of the spring constant (force constant) of this spring?