Determine the height above the earth’s surface at which the potential energy of a load

Determine the height above the earth’s surface at which the potential energy of a load with a mass of m = 400kg is 1.0kJ.

Initial data: m (indicated body weight) = 400 kg; En (potential energy of the body at the desired height) = 1 kJ (10 ^ 3 J).

Reference values: g (acceleration due to gravity) ≈ 10 m / s2.

The sought height of the body above the earth’s surface is calculated from the calculation formula for the potential energy: En = m * g * h, whence h = En / (m * g).

Let’s perform the calculation: h = 10 ^ 3 / (400 * 10) = 0.25 m (25 cm).

Answer: The body is 25 centimeters above the ground.