Question

when the forcce and the displacement are in the some direction (cos9=0) the qork done by the force is _______​

Answer 1

Answer:

Work done = Force ∗ displacement i.e W = F.x Cosθ where θ is the displacement angle

W = F. Cos 90 = 0 (Since Cos 90 degree is equal to zero)

Hence when the force applied and displacement of the body are inclined at 90 degree's with each other work done is zero.

Answer 2

Answer:

Not 100% sure , but 1 is the correct answer.