Question

What is the work done?

Answer 1

1. Work done is the product of force applied on an object and magnitude of the displacement.
2. Mathematically, $W=f.r=\left|f\right|\left|r\right|\cos \theta$, where $f$ is the force applied in the direction of displacement, $r$ is the displacement ,$\theta$ is the angle between force and displacement and $W$ is the work done.
3. Components of force is resolve in $f\cos \theta$ and $f\sin \theta$.
4. Take the component of force which is in the direction of displacement, which is $f\cos \theta$.