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An object thrown at a certain angle to t...

An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?

Text Solution

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The displacement of the object is in the horizontal direction. The force of gravity on the object acts vertically downwards. Workdone by this force is zero as the force is perpendicular to displacement.
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