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JefeNorte
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Homework Statement
A block of mass m resting on a 20 degree slope. The block has coefficients of friction mu_s =0.80 and mu_k =0.50 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg.
What is the minimum mass m that will stick and not slip?
If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have?
Homework Equations
T-f_k-(mg*sin(theta))=m*a
f_k=u_k*(mg*cos(theta))
The Attempt at a Solution
I completed the first part of the problem and determined that the minimum mass is 1.829 kg. I calculated the tension on the rope by multiplying the mass of the hanging block by 9.8. But when I plug these values into the equation I keep getting 2.76 m/s^2 which is not the correct answer. Is there something wrong with my equations or the tension value?