If a planet has a tilt of zero degrees. What seasonal changes would be expected on this planet?

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

What are two different ways you could find the value of a? explain these methods.

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?