Estimate the change in gravitational potential energy when a person with mass 80 kg rise from bed to a standing position. Assuming that the center of mass of a person is elevated by approximately Δh=0.50m. Express your answer with the appropriate units.

change in gravitational potential energy Δ PE = 392 J

Explanation:

given data

mass of the person m = 80 kg

height of the centre of mass Δh = 0.50 m

to find out

change in gravitational potential energy

solution

we get here change in gravitational potential energy that is express here as

change in gravitational potential energy Δ PE = m * g * Δh ... 1

put here value we get

change in gravitational potential energy Δ PE = m * g * Δh

change in gravitational potential energy Δ PE = 80 * 9.8 * 0.50

change in gravitational potential energy Δ PE = 392 J