Give me solution for this

Dear Student

When force and displacement are in the same direction, angle is 0. Cos 0 = 1. Hence, work is done.

When force and displacement are perpendicular to each other, angle is 90. Cos 90 = 0. Hence there is no work done.

​​​​​​When the force has a component in the direction opposite to the displacement, the force does negative work.

Regards

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