1.

Three different stones \[P,\,\,Q\] and \[R\] of different weights are lifted from the ground level to different heights on different planets as given below: P: A 250 g stone is lifted to 10 m on the Earth. Q: A 800 g stone is lifted to 2 m on Saturn. R: A 1kg stone is lifted to 1 m on Jupiter. Which of the following statements is true? (Given that the acceleration due to gravity on the Earth, the Saturn and the Jupiter are \[10\,\,m\,\,{{s}^{-2}},\,\,15\,\,m\,\,{{s}^{-2}}\] and \[25\,\,m\,\,{{s}^{-2}}\] respectively).

A. More energy is required to lift stone \[Q\] than stone\[P\].
B. More energy is required to lift stone \[P\] than stone\[R\].
C. Stone \[P\] and stone \[Q\] require the same amount of energy.
D. Stone \[P\] and stone \[R\] require the same amount of energy.
Answer» E.


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