- #1
Seung Lee
- 6
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Homework Statement
I got this problem:
A wedge of mass m = 36.1 kg is held in place on a fixed plane that is inclined by an angle θ = 21.3° with respect to the horizontal. A force F = 302.3 N in the horizontal direction pushes on the wedge, as shown in Figure 4.25a. The coefficient of kinetic friction between the wedge and the plane is μk = 0.159. Assume that the coefficient of static friction is low enough that the net force will move the wedge.
http://semmedia.mhhe.com/physics/bau...dge/index.html
basically what's there except friction would be the other way around (since its accelerating up the slide.
Homework Equations
FBD
Sum of all forces = ma
The Attempt at a Solution
I did a free body diagram and got:
Summation of forces in y:
Normal force = mg sin theta + Appliedforce sin theta
Then for the forces in x:
mgcos + friction - Aplliedforce sin = 36.1a
I did solve for everything but strangely the acceleration gives me acceleration = 3.2
Can any1 help me if I am doing something wrong? Like getting cos and sin mixed?