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One man takes 1 minute to raise a box to a height of 1 m, and another man takes ½ minute to do so. The energy of the two is
  • a)
    Different
  • b)
    Same
  • c)
    Energy of the first is more
  • d)
    Energy of the second is more
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
One man takes 1 minute to raise a box to a height of 1 m, and another...
Solution: Energy to lift a weight is calculated as:
E = mgh
Here height, h is the same for a box, so energy will be the same.
However, power is different as it is defined as the rate of energy to do work. Since the second man takes a shorter time for the same amount of work, he has greater power and does work faster.
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One man takes 1 minute to raise a box to a height of 1 m, and another man takes ½ minute to do so. The energy of the two isa)Differentb)Samec)Energy of the first is mored)Energy of the second is moreCorrect answer is option 'B'. Can you explain this answer?
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