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

Math, Math Problems and Solutions, Tests, Formulas, Algebra.

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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