Question

How much work would it take to push a `4 kg` weight up a `1 m` plane that is at an incline of `pi / 4`?

Answer 1

Here work will be done against the component of force of gravity acting on the weight downwards along the plane.

So,for moving the weight with constant velocity,we just need to supply that amount of external force i.e `mg sin ((pi)/4)=27.72N`

So,work done in causing displacement by `1m` would be `W=F.s=27.72×1=27.72J`