An ideal cord is connected to a wall on the top of an inclined plane at one end and is wound around a thin homogeneous cylinder of mass M and radius R. The inclination angle is ϑ and the static and dynamic friction coefficients between cylinder and plane are μs, μd , and the viscosity of the air is
negligible. The cylinder is at rest at the time t=0. Find the linear and angular acceleration of the cylinder.
- I didn't really get why the static friction is oriented downwards along the inclined.