Find the value of the kinetic energy of a body weighing 400 g, which fell from a height of 5 m

Find the value of the kinetic energy of a body weighing 400 g, which fell from a height of 5 m at the moment of impact on the ground.

Data: m (mass of the fallen body) = 400 g; h (height from which the body fell) = 5 m; the fall of the body is considered free (V0 = 0 m / s).

Reference data: g = 10 m / s2.

SI: m = 400 g = 0.4 kg.

Since the body fell freely, then, according to the law of conservation of energy, the kinetic energy of the body at the moment of impact on the ground will be equal to its potential energy at a given height: Ek = En = m * g * h.

Calculation: Ep = 0.4 * 10 * 5 = 20 J.

Answer: At the moment of impact on the ground, the body will have a kinetic energy of 20 J.