The mass of a person is 20 kg. How fast should he run so that his kinetic energy is 1000 J ?

Question: The mass of a person is 20 kg. How fast should he run so that his kinetic energy is 1000 J?

100m/s

10m/s

1000m/s​

Answer:  Kinetic energy=1/2mv2
here 1000=1/2*20*v2

so 20v2=2000
so v2=100

so v = root 100

=10m/s

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