Question

A running man has half the kinetic energy than a boy of half his mass has. The man speed up by 1.0 ms and then he has the same energy as the boy. The original speeds of the man and boy respectively are :
(a) 2.4 ms!, 1.2 ms -1
(b) 1.2 ms?, 4.4 ms-
(c) 2.4 ms -1, 4.8 ms -1
(d) 4.8 ms?, 2.4 ms-1​

Answer 1

Answer:

Correct option is

A

2.4 m/sec , 4.8 m/sec

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