# Object being pushed up an inclined plane

by Bushman
Tags: inclined, object, plane, pushed
 P: 3 I can't figure out how to get the mass of this object, with the information given: Inclined plane with angle relative to the ground of 20 degrees. It takes 70 Newtons to get the object moving up the plane. "Mu" of static friction: 0.35 All my example problems involve an object going down an inclined plane. I have been working on this problem all day, and just seem to get myself more and more confused. Any help would be appreciated.
 P: 227 try drawing a free body diagram- the forces acting on the block are the push, friction, the normal force, and weight.
 P: 3 I have :(. I don't know the weight, only what I gave above. It seems to me like I need one more piece of information, such as the weight. That is why I posted here, to see if I was missing something obvious.
P: 227

## Object being pushed up an inclined plane

well, you are solving for the weight, to get the mass.

you know that $F_f = \mu N = \mu Wcos(\Theta)$
 P: 3 So that means: Fsubf = 24.5 24.5 = mu x W x cosTheta 24.5/(mu x cosTheta) = W Thank you so much, I did not recall that relationship between the Friction force and muN.

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