Question

How fast should a boy of 60kg run so that his kinetic energy be 600j.

Answer 1

E.K=750 J

Mass=60 kg

E.K=1/2mv^2

750=1/2×60×v^2

750=30×V^2

V^2=750/30

=25

V=5m/s

So,the man have to run at the rate of 5 metres per second.

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Answer 2

Explanation:

How fast should a boy of 60kg run so that his kinetic energy be 600j.