Bodies weighing 100 kg fell from a height of 10 m onto the roof of a house whose height is 3 m. What is the work done by gravity?

We express the work of gravity by the formula:
A = F * S, where F is the applied force, F = Ft = m * g (m is the body mass (m = 100 kg), g is the acceleration of gravity (we take g = 9.8 m / s ^ 2), S – body movement.
Since the body falls from a height of 10 m, and the height of the house is 3 m, the movement of the body will be: S = 10 – 3 = 7 m.
Let’s calculate the work of gravity:
A = F * S = m * g * S = 100 * 9.8 * 7 = 6860 J.
Answer: The work of gravity is 6860 J.