17. A figure skater started his spinning at 3 rev/sec initially with rotational inertia 35 kgm². Then he pulled his arms closer toward the center of his body to decrease the moment of inertia to 20 kgm². What is the final spinning in rev/sec? a. 5.25 rev/s b. 1.71 rev/s c. 3.00 rev/s d. 3.14 rev/s

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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.