A running man has half the kinetic energy of that of a boy of half of his mass. The man…
Physics · NEET · NTA Exams — Work, Energy and Power
A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by 1 m/s. so that he has the same kinetic energy as that of the boy. The original speed of the man is
- \((\sqrt{2}-1) \mathrm{m} / \mathrm{s}\)
- \(\sqrt{2}\) m/s
- \(\frac{1}{(\sqrt{2}-1)} \mathrm{m} / \mathrm{s}\)
- \(\frac{1}{\sqrt{2}} \mathrm{~m} / \mathrm{s}\)
Answer
(A) ( 2 -1) m / s
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