# 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 ?

So,for moving the weight with constant velocity,we just need to supply that amount of external force i.e $m g \sin \left(\frac{\pi}{4}\right) = 27.72 N$
So,work done in causing displacement by $1 m$ would be W=F.s=27.72×1=27.72J