Question

When force acting on a body is perpendicular to the direction of motion then work done is
negative force
positive force
zero force
none of these

Answer 1

Answer:

Zero force

Explanation:

When force is acting on a moving body in perpendicular direction, Work done by the force will be zero, because W = F.S cos θ, where θ = 90, and cos 90 = 0, so W = 0. So, there will be no change in the magnitude of velocity (or speed) of the body. However, the direction of motion of the body will be affected.

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