Compare the kinetic energy of a ball of mass m1 flying at a speed of V1 and a person of mass m2 running at a speed of V2.

Let’s remember the formula for finding the kinetic energy of a body:
Ek = m * V ^ 2/2
Eк1 = m1 * V1 ^ 2/2
Ek2 = m2 * V2 ^ 2/2
the ratio of kinetic energies is:
Ek1 / Ek2 = m1 * V1 ^ 2 / m2 * V2 ^ 2

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