The power is at P.
Where is the weight?
The weight is at W.
Upon what does the power and the weight depend?
They depend upon the height and the length of the inclined plane.
When an inclined plane is ten feet long and only one foot high, how much will one pound at P balance?
One pound at P will balance ten pounds at W.
When an inclined plane ten feet long is two feet high, how much will one pound at P balance?
One pound at P will then balance only five pounds at W; because the plane is five times as long as it is high.
Where else may the power be exerted?