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Question

To what height should an object of mass 2kg be raised so that its potential energy is 980J?


A

50 cm

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B

100 m

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C

50 m

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D

100 cm

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Solution

The correct option is C

50 m


Potential energy is mathematically represented as P.E. = m×g×h
where m is the mass, g is the acceleration due to gravity and h is the height from the ground.

On substituting the values, we get:
980=2×9.8×h
or, h=50m


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