Question

A work crew is using a pulley to lift a small piano up the outside of a building to a second- floor balcony. The piano has mass 180 kg. At a height of 3.0 m, what is the piano’s gravitational potential energy with respect to the ground?

Answer 1

Answer: 5,300 j

Step-by-step explanation:

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Answer 2

An object above the ground has potential energy due to its height above the ground. The formula for calaculating potential energy is expressed as

Potential energy = mgh

where

m represents mass of object

g represents acceleration due to gravity = 9.8 m/s^2

h represents height of object

From the information given,

m = 180

h = 3

By substituting these values into the formula,

Potential energy = 180 x 9.8 x 3

Potential energy = 5292 J