Determining the frictional resistance.

[lauralovesyou]

How would you determine the frictional resistance between an inclined plane and cart (with wheels) when you are pulling the cart with a spring scale along the plane when you know:
mass of cart, vertical height of plane , displacement (hypotenuse of inclined plane), applied force needed to drag the cart on inclined plane, work input: Fd and work output: mgh?

 

[pgardn]

How would you determine the frictional resistance between an inclined plane and cart (with wheels) when you are pulling the cart with a spring scale along the plane when you know:
mass of cart, vertical height of plane , displacement (hypotenuse of inclined plane), applied force needed to drag the cart on inclined plane, work input: Fd and work output: mgh?

Is the cart pulled at a constant velocity? probably so...

Do you know how to find the force required to pull the cart at a constant velocity if the plane was frictionless? Not an experiment, just done on paper?