Finding F on a box on an inclined plane

AI Thread Summary
The discussion revolves around solving a physics problem involving a block on an inclined plane, with a focus on determining the force required to prevent slipping, initiate movement, and maintain constant velocity. Key equations related to static and kinetic friction are mentioned, emphasizing the need for a free body diagram (FBD) to analyze the forces acting on the block. Participants express confusion over the problem-solving process, particularly after drawing the FBD. The importance of establishing the x and y equations from the FBD is highlighted as a crucial step for further assistance. Clarifying these equations will help in finding the minimum force values needed for the block's movement.
mistabry
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Homework Statement



A block weighing 87.5 N rests on a plane inclined at 25.0o to the horizontal. A force is applied to the object at 50.0o to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the plane are, respectively, 0.335 and 0.156.
(a) What is the minimum value of F that will prevent the block from slipping down the plane?
(b) What is the minimum value of F that will start the block moving up the plane?
(c) Once moving, what value of F will move the block up the plane with constant velocity?


Homework Equations


fs<= μs|N|
fk= μk|N|

The Attempt at a Solution


I attempted the problem by drawing out a free body diagram of what is occurring, but I was unable to continue after that because everything got all confusing! Help D;!
 
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hi mistabry! :wink:

mistabry said:
I attempted the problem by drawing out a free body diagram of what is occurring, but I was unable to continue after that because everything got all confusing! Help D;!

the fbd has only four forces …

what are your x and y equations? :smile:
 
You have to do it using FBD. Though confusing, you have to post it. We will take after that.
 

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