What is the mass of a body if at a speed of 5 m / s its kinetic energy is 50 J?

V = 5 m / s
Ek = 50J
Find: m-?
Let’s compose the equation of kinetic energy.
Ek = mV ^ 2/2
Let us express m:
m = 2Ek / V ^ 2 = 100/25 = 4kg
Answer: m = 4kg

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