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# CBSE Class 11-science Answered

An airplane with a mass of 2000 kg sinks 1000 metres moving forward a horizontal distance of 10,000 metres. What will be its new potential energy? (Take g = 10 m/s2)
Asked by Topperlearning User | 08 Jul, 2014, 10:19: AM
Expert Answer

Mass of the airplane is m = 2000 kg

Decrease in height (sinks) is h = 1000 m
Distance covered = 10,000 metres
So by the potential energy relation, the change in the gravitational potential energy of the airplane
= m x g x h.
Thus, the new potential energy is
2000 x (10) x (1000) = 2 x 107 J
Answered by | 08 Jul, 2014, 12:19: PM

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