Q.

The energy of an object increases when it is raised through a height because :

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a

The gravitational force exerted on the object reduces to zero.
 

b

Work is not done on it

c

 The gravitational force on the object increases.

d

Work is done on it against gravity while it is being raised.
 

answer is A.

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Detailed Solution

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  • When an object is raised through a height, work is done against the gravitational force. This work gets stored in the body in the form of gravitational potential energy.
  • As a result, the energy of the body increases.
  • Therefore, we can say that the energy of an object increases when it is raised through a height because work is done on it against gravity while it is being raised.
     
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