A solid homogeneous cylindrical disk is released from rest at the top of an incline.
Its radius is 0.15 m, its mass 5 kg, the incline angle 30 degrees. The static and kinetic coefficients of friction are 0.15 and 0.1 respectively.
1. What is the acceleration of the center of disk?
2. What is the magnitude of the friction force between the ramp and the cylindrical disk?