Question

A baby stroller is a rest on top of a hill which is 10 m high. The stroller and baby have a mass of 20 kg. What is the potential energy of the baby and stroller?

Formula: PE = m g h (Gravity near earth is 9.8 m/s²)

Answer 1

The potential energy is defined as the energy is contained in the body due to the height over the surface of the earth and it is calculated from the equation

`PE=mgh`

where:

• PE: the potential energy in Joules.
• m: the mass of the body in kg.
• g: the acceleration due to the gravity in m/
  `s^2`
• h: the height of the body over the earth in meters.

in our problem:

`PE=20*9.8*10=1960 J`