# Can two bodies, whose masses differ by four times, have the same kinetic energy? If so, under what conditions?

Two bodies with four times the mass can have the same kinetic energy. As we remember, the kinetic energy is equal to half the mass of the product of the body’s mass by the square of its velocity. In the case of our bodies, four squares of the speed of the first body is equal to the square of the speed of the second body. This means that the square of the speed of the first body is 4 times less than the square of the speed of the second, therefore. A body with less mass must have twice the speed of a body that is four times heavier. in this case, their kinetic energies will be equal.

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