A weight m = 2 kg fell from a height of 8, how much heat was released in this case?

Given:

m = 2 kg is the mass of the weight;

h = 8 m – height from which the weight fell;

g = 9.8 N / m ^ 2 – acceleration of gravity;

It is required to find A (J) – the amount of heat released when the weight falls.

At a height h, the weight has some potential energy En, which, as it falls, turns into kinetic Ek. At the moment of impact, all the kinetic energy of the body will go into internal A, which will be the amount of heat released. According to the law of conservation of energy, En = Ek = A, that is:

A = m * g * h = 2 * 8 * 9.8 = 156.8 J.

Answer: when the weight fell, 156.8 J of heat was released.