Question

How much work would it take to push a `4 kg` weight up a `15 m` plane that is at an incline of `pi / 4`?

Answer 1

`416.203\ J`

Explanation:

Assuming that there is no friction on the plane i.e. there is no loss of energy then the work done, on the weight of `4\ kg` to push up a distance of `15\ m` on the plane inclined at an angle `\theta=\pi/4` , is equal to the change in potential energy to lift weight to a vertical height `15\sin(\pi/4)` given as follows

`Mgh`

`=4\cdot 9.81\cdot 15\sin(\pi/4)`

`=416.203\ J`