Question

a set of pulleys is used to lift a piano weighing 1,000 netwons. the piano is lifted 3 meters in 60 seconds. How much power is used

Answer 1

P = W/t

P = F.s/t

P = 1000.3/60

P = 50 watt

Answer 2

Answer:

50 watts

Explanation:

Formula

Power = Work / time

Work = Force  * distance        Substitute the formula for work into power

Power = Force * distance / time

Givens

F = 1000 N

d = 3 meters

t = 60 seconds

Solution

Put the givens into the power formula

Power = 1000 * 3 / 60

Power = 50 watts