By what fraction does the mass of a boy increase when he starts running at a speed of 12 km h−1?
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Answer:
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Explanation:
Given: The boy’s speed,
The boy’s rest mass is shown as m.
The boy’s kinetic energy,
Increase in the body’s energy = Boy’s kinetic energy
When there is an increase in energy, it is converted into mass. So,
Increase in mass
Fraction increase in mass
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