The solid homogeneous cylinder is released from rest on the ramp. If $=40,{}_s=0\mathrm{.}30,$ and ${}_k=0\mathrm{.}20,$ determine the acceleration of the mass center $G$ and the friction force exerted by the ramp on the cylinder.

Ans:

$a=4\mathrm{.}28\frac{m}{s^2}$

$F_f=5\mathrm{.}51N$