A running man has half the KE that a boy of half his mass has. The man speeds up by 1m/s…
Physics · JEE Main · NTA Exams — Work, Energy and Power
A running man has half the KE that a boy of half his mass has. The man speeds up by 1m/s and then has the same KE as that of boy. The original speeds of man and boy in m/s are:
- \((\sqrt{2}+1),(\sqrt{2}-1)\)
- \((\sqrt{2}+1), 2(\sqrt{2}+1)\)
- \(\sqrt{2}, \sqrt{2}\)
- \((\sqrt{2}+1), 2(\sqrt{2}-1)\)
Answer
(B) ( 2 +1), 2( 2 +1)
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