A 3.0kg mass is held 4.2 m above the ground. What is the potential energy of the mass with respect to the ground?

Answer;

126 joules

Explanation;

Potential energy is the energy possessed by a body while at rest.

It is calculated by the formula m*g*h; where m is the mass, h is the height and g is the gravitational acceleration, 10N/kg

Potential energy = m*g*h

= 3.0 * 4.2 * 10

= 126 joules