When moving at a speed of 72 km / h, the body has a kinetic energy of 600 J. Find the mass of the body.

univerkov | June 18, 2021 | education

To calculate the mass of the body in question, we use the formula: Ek = m * V2 / 2, whence m = 2 * Ek / V ^ 2.

Let’s write down the values of the variables: Ek – kinetic energy of the body (Ek = 600 J); V is the speed of movement (V = 72 km / h, in the SI system V = 20 m / s).

Let’s calculate: m = 2 * 600/20 ^ 2 = 3 kg.

Answer: Body weight is 3 kg.

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