Question

what should be the angle between the direction of force and the direction of motion of a body so that work done is zero?​

Answer 1

Answer:

Angle should be 90° between the direction of force and the direction of motion of a body as workdone is equal to force .

or

F=Force ,d= Displacement ,theta =Angle

between force and displacement

W = F.D.costheta

cos90° = 0

so,in case of zero work, the angle between the force and displacment is 90°.