A body with a mass of 200 g slides on a horizontal table at a constant speed of 15 cm / s. What is its kinetic energy?

If we assume that the body moves in a closed system, then the kinetic energy of the body can be calculated by the formula:
Ek = (m * V²) / 2, where Ek is the kinetic energy of the body (J), m is the mass of the body (m = 200 g = 0.2 kg), V is the speed of movement of the body (V = 15 cm / s = 0 , 15 m / s).
Let’s calculate the kinetic energy of a moving body:
Ek = (m * V²) / 2 = (0.2 * 0.15²) / 2 = 0.00225 J = 2.25 mJ.
Answer: The kinetic energy of the body is 2.25 mJ.