Find the modulus of the velocity of a body whose mass is 2.0 kg and has a kinetic energy of e = 100J.

The kinetic energy of a moving body can be calculated by the formula:

Ek = m * V² / 2, where Ek is the kinetic energy of a moving body (Ek = 100 J), m is the mass of the body (m = 2 kg), V is the speed of the body (m / s).

Let us express and calculate the modulus of the body’s velocity:

V² = 2 * Ek / m.

V = sqrt (2 * Ek / m) = sqrt (2 * 100/2) = sqrt (100) = 10 m / s.

Answer: The module of the body’s velocity is 10 m / s.