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The work done by a force F during a displacement r is given by F·r. Suppose a force of 12 N acts on a particle in vertically upward direction and the particle is displaced through 2.0 m in vertically downward direction. Find the work done by the force during this displacement.

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Detailed Solution

The angle between the force F and the displacement r is 180°. Thus, the work done isW=F·r=F r cosθ =(12 N)(2.0 m)cos180° =-24 N-m=-24 J

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The work done by a force F during a displacement r is given by F·r. Suppose a force of 12 N acts on a particle in vertically upward direction and the particle is displaced through 2.0 m in vertically downward direction. Find the work done by the force during this displacement.