Finding the applied force with theta, A, M, and Mu as givens?

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SUMMARY

The discussion focuses on calculating the applied force required to accelerate a 2 kg block at 1.1 m/s² at an angle of 25 degrees above the horizontal, with a coefficient of kinetic friction (μ) of 0.3. The equations involved include F(net y) = Fn + Fav - W, Ff = μ x Fn, and F(net x) = Fah - Ff. The user seeks assistance in determining the normal force (Fn) after substituting the known variables into the equations.

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Potatoe
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Homework Statement


What must be the applied force (25 degrees above the horizontal) in order to accelerate a block at 1.1 m/s^2, if the mass is 2kg and the coefficient of kinetic friction is .3?

Homework Equations


F(net y)=Fn + Fav - W
Ff = μ x Fn
F(net x)=Fah-Ff

The Attempt at a Solution


I've substitued the variables in and gotten these:
2(1.1) - xsin25 + 2(9.81) = Fn
Ff = .3Fn
2(1.1) = xcos25 - Fn

How do I find Fn?
 
Last edited:
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Sorry, I'm not sure how to insert mu as a symbol or do subscripts
 
Potatoe said:
Sorry, I'm not sure how to insert mu as a symbol or do subscripts

Just copy and paste this symbol:

μ

where you need it, and to do subscripts or superscripts, just look at the toolbar at the top of the thread entry and you'll se a bold X with blue 2 subscript/superscript. It's near to big blue eye symbol and the TV icon!
 

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