Calc/Physics Problem:?

Question

If a pump is to move 9 tons of water to the top of an 11 storey building in one hour, what must be the theoretical horsepower rating of the pump? (Assume that a storey is ten feet. A horsepower is 550 footpounds per second or 33,000 footpounds per minute.)

Answer 1

A 3.0-g bullet traveling at 350 m/s hits atree and penetrates a distance of 12 cm. What was the average force exerted on the bullet in bringing it to rest?