Figure shows a block of mass m resting on a 20* slope. The block has coefficients of friction uS=0.80 and uK=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?
The Attempt at a Solution
I really have no idea how to do Part B, but I tried part A and was real confident with my answer but it turned out wrong. This is what I did.
(2kg)(9.8)=19.6N for the hanging mass
assuming that the Hanging mass = to the tension force on the block with mass m I then did this...
m=2.66kg and this is wrong
Were did I go wrong?
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