Question

) Explain the work done by a constant force, when the direction of the force and the displacement maybe-
i) Same ii) Opposite
iii) Perpendicular to each other iiii) There may not be displacement at all

Answer 1

Explanation:

1. if direction of force and displacement is same . then, work done is positive .

2. if direction of force and displacement is opposite. then, work done is negative .

3. if both are perpendicular to each other .then, work done is zero because angle between force and displacement become 90° . ( as work = fdcos∅ , cos90° = 0)

4. if there is no displacement . Work done is zero .

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