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?


Question: 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?

The work done by the force of gravity in this situation is zero. The work done by the force of gravity is defined as product of mass of the object, gravitational acceleration and the vertical displacement of object.  Because the initial and final point of the trajectory lies on the same horizontal line as there is no vertical displacement and therefore there is work the work done is zero.

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