A girl weighing 50 kg climbed the stairs to a height of 2 m from the surface of the earth.

A girl weighing 50 kg climbed the stairs to a height of 2 m from the surface of the earth. What potential energy does she have at this height?

Potential energy is energy that is determined by the mutual position of interacting bodies or parts of the same body.
E (p) = m * g * h;
E (p) is the potential energy of the body, m is its mass, g is the acceleration of gravity, h is the height of the body above some zero level.
m = 50 kg
h = 2 m;
g = 9.8 / s ^ 2;
E (p) = 50 * 2 * 9.8 = 980 J.
Answer 980 J.