rigid body rotation: disc of mass m, radius r rolls down slope of incline tan^-1 3/4

markosheehan

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May 12, 2016
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a disc of mass m and radius r rolls down a slope of incline tan^-1 3/4. the slope is rough enough to prevent slipping. the disc travels from rest a distance of s metres straight down the slope.
(i) show that the linear acceleration of the disc is 2/5 g.
what i did was i first revolved the forces and i got 2 equations
R=4/5 g and 3/5 mg-F=ma but i dont know where to from here
 
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