What is the speed of a body weighing 1 kg if the kinetic energy is 4.5 J?

univerkov | March 15, 2021 | education

Problem data: m (mass of the considered body) = 1 kg; Ek (kinetic energy possessed by the body) = 4.5 J.

The speed of movement of the body under consideration can be expressed from the formula for calculating the kinetic energy: Ek = 0.5 * m * V ^ 2, whence V ^ 2 = 2Ek / m and V = √ (2Ek / m).

Let’s calculate: V = √ (2 * 4.5 / 1) = √9 = 3 m / s.

Answer: The body in question is moving at a speed of 3 m / s.

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