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The work done by a force vecF during a d...

The work done by a force `vecF` during a displacement `vecr` is given by `vecF.vecr`. Suppose a force of 12 N acts on a particle in vertically upward directionand the particle is displaced through 2.0 m in vertically downward direction. Find the work done by the force during this displacement.

Text Solution

Verified by Experts

The angle between the force `vecF` and the displacement `vecr` is `180^0`. Thus, the work done is
`W=vecF.vecr`
`=Frcostheta`
`=(12 N)(2.0m)(cos150^0)`
=-24N-m=-24J`.
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