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Homework Statement
A 215 N box is placed on an inclined plane that makes a 35.0º angle with the horizontal.
a) Draw a free body diagram which indicates all forces acting on the box.
b) Calculate components of weight force parallel and perpendicular to the plane.
c) If the crate is at rest, calculate the force of friction.
d) Now assume that the create accelerates down the incline at 5 m/s^2. What must force of friction be?
e) Find the coefficient of friction in part d
Homework Equations
http://www.algebralab.org/img/d0c27dd9-1bf4-48da-96bd-89f6397bc762.gif
The Attempt at a Solution
http://www.glenbrook.k12.il.us/gbssci/Phys/Class/vectors/u3l3e7.gif
I know how to draw the free body diagram. I think the components of the weight force is mgcos35 and mgsin35 which is 176 and 123 respectively. I don't know how to do questions c, d, or e.
4. Sorry
I know I sound stupid asking this amateur question. I really need to stop sleeping in physics class...
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