Work done by a force is positive when the force has a component in the direction of displacement, zero when the force is perpendicular to the displacement, and negative when the force has a component opposite to the direction of displacement.
In following three cases A, B and C, the force F is acting on object of mass m (as shown in figure). The direction of displacement is shown by longer arrow. The work done in cases A, B and C will be respectively -
Asked in School Lecturer (Sanskrit Edu.) 2022 3 2022 · Topic: Mechanics (Work, Energy, and Power)
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