Categories > Work, Energy and Power > WEP > A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by 1m/s so as to have same K.E. as that of the boy. The original speed of the man will be

Work, Energy and Power

Question: A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by 1m/s so as to have same K.E. as that of the boy. The original speed of the man will be


1) $\sqrt 2 \,m/s$
2) $(\sqrt 2 - 1)\,m/s$
3) $\frac{1}{{(\sqrt 2 - 1)}}m/s$
4) $\frac{1}{{\sqrt 2 }}m/s$
Solution: Explanation: No Explanation
WEP Conservation of Energy and Momentum

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