A cylinder of mass M and radius Ris rotated in a uniform V-shaped groove with constant angular velocity w. The coefficient of kinetic friction between the cylinder and each surface is Hk. What is the magnitude and direction of the torque that must be applied to the cylinder to keep it rotating at that angular velocity? You may assume that whatever agent is applying the torque is applying zero net force on the cylinder. 45° 45°

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Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.