Question

A piano with a mass of 130 kg is lifted 10m above the ground in 5 s by a crane.

What is the power used by the crane

Answer 1

The 2548 watts should be the power that is used by the crane according to the formula

Answer 2

`power = 2548 \: watt \\ solution \\ mass = 130 \: kg \\ distance = 10m \\ time = 5 \: sec \\ power = (w)/(t) \\ \: \: \: \: \: \: \: \: \: \: = (f * d)/(t) \\ \: \: \: \: \: \: \: \: = \: (m * g * d)/(t) \\ \: \: \: \: \: \: \: \: \: = (130 * 9.8 * 10)/(5) \\ \: \: \: \: \: \: \: \: = (12740)/(5) \\ \: \: \: \: \: = 2548 \: watt \\ hope \: it \: helps`