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A rope ladder with a length l carrying a man with a mass m at its end is attached to the basket of a balloon with a mass M. The entire system is in equilibrium with the air. As the man climbs up the ladder into the balloon, the balloon descends by a height h. Then the potential energy of the man (1) increases by mg (l – h) (2) increases by mgh (3) increases by mgh (4) increases by mg (2l – h)

A rope ladder with a length l carrying a man with a mass m at its end is attached to the basket of a balloon with a mass M. The entire system is in equilibrium with the air. As the man climbs up the ladder into the balloon, the balloon descends by a height h. Then the potential energy of the man
(1) increases by mg (l – h)
 (2) increases by mgh
(3) increases by mgh
(4) increases by mg (2l – h)

Grade:10

1 Answers

Arun
25750 Points
6 years ago
Effective height through which man moves up (l - h) 
Gain in potential energy = mg (l - h) 
 
Hence option A is correct

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