ow much power (in kW) is required to raise an elevator with a mass of 1,722 kg at a rate of 54 metres per minut

What is the average power supplied by a 60 kg person running up a flight of stairs a vertical distance of 4 m in 4.2s?

How much work is done (in J) when a weight lifter lifts 190 kg from 1.5 m to 2.0 m above the ground? (Use 9.8 m/s2 for g.)

A dog races up the stairs in a time of 1.80 seconds.  If the stairs are 12 feet high, how much power in hp is the dog putting out?  The weight of the dog is 48 lbs.

586 N of force was applied to move a box across a floor for the distance of 15 m. How much work, in the unit of J, is done on the box by the force?

A 2,000-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 3.00 m before coming into contact with the top of the beam, and it drives the beam 14.6 cm farther into the ground as it comes to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest.

A man pushes a lawn mower on a level lawn with a force of 193 N. If 51% of the force is directed horizontally, how much work is done by the man in pushing the mower 5.8 m? _____ J

A man pushes a lawn mower on a level lawn with a force of 206 N. If 31% of this force is directed forward, how much power does he expend in pushing the mower 7.3 m in 10 s?

Ignoring friction, how much work is required to lift an elevator car with a mass of 1050 kg from a height of 22.0 m above the ground to a height of 68.8 m above the ground?

A man pushes a lawn mower on a level lawn with a force of 189 N. If 28% of this force is directed forward, how much power does he expend in pushing the mower 5.5 m in 16 s?