A helicopter can take off in three different paths. For which path it will have to do more work? Consider air drag acting on the helicopter to be zero.

Path A

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Path B

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Path C

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Work done is same for all paths

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Solution

The correct option is D Work done is same for all paths
The helicopter has to work against the force of gravity to reach height h. As gravity is a conservative force, work done by or against it does not depend on the path taken. Hence, the work done by the helicopter to reach the height h will be the same for all the paths.

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