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26-07-2019
Physics

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A boy Is it running with a kinetic energy of 810 J. If the boy has a mass of 80 kg what is his speed

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as10980 as10980

26-07-2019

Answer:

10.125

Explanation:

Answer Link

MathPhys MathPhys

26-07-2019

Answer:

4.5 m/s

Explanation:

Kinetic energy is:

KE = ½ mv²

where m is mass and v is velocity.

Given KE = 810 J and m = 80 kg:

810 J = ½ (80 kg) v²

v = 4.5 m/s

Answer Link

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