a 5 kg concrete block accelerates down a 34 degree slope at 4.2m/s^2. Find the coefficient of friction between the block and the slope.
The net force along the slope that produces the acceleration is
F = M g sin 34  u M g cos 34 = M a
where u is the coefficient of friction.
M cancels out you don't need to know it. You can solve for u
I get u = 0.158, but don't trust my math. Check my thinking and do the numbers.
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