Question

A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is

Answer 1

For this case we have that by definition, the potential energy of an object is given by:

`U = mgh`

Where,

• m: mass of the object
• g: acceleration of gravity
• h: height of the object

Substituting values we have:

`U = (2) (9.8) (4)\\U = 78.4 J`

Answer:

Relative to the ground its potential energy is:

`U = 78.4 J`