Question

A disk rolls smoothly down an incline. (a) If α = 25⁰, calculate the translational acceleration of the center of mass of the disk. (I = 1/2 MR²); (b) Analyze forces acting on the disk. What forces cause the translational motion and the rotational motion of the disk?

Answer 1

a)

$$a=g\sin{25}\\a=9.8\sin{25}=4.1\frac{m}{s^2}$$

b) Weight and frictional force.