Question

W=Fcos theta*s
so what does cos means in this work done formula

Answer 1

W = F Cos Ф  * s
         F = force (vector) applied on an object.,        s = displacement (vector)
         Ф = angle between the force and displacement vectors.

   Cos Ф gives the component of force along the direction that the body is displaced.
   ie.,  F Cos Ф and s are in the same direction.

Answer 2

Work done by a force is given by the equation W = F cos ϴ  s. Determine and

explain the effect of work done due to a gradually increasing angle ‘ϴ’.