(a) A large rotating flywheel uniformly increases in angular speed from rest to 0.210 rev/s in 26.0 s. What is its angular acceleration in radians per second per second? rad/s2   (b) The same flywheel again starts from rest and accelerates uniformly in the same time interval, but now the angular acceleration is double that found in part (a). What is true about the final angular speed?       a. It is the same as the value given in part (a).       b. It is half the value given in part (a).            c. It is double the value given in part (a).         d. It is quadruple the value given in part (a).

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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.