An 8.0-cm diameter hard disk spinning at 7200 rpm can stop in 19 revolutions. a) What is the magnitude of the angular acceleration? Express your answer in radians per second squared. b) How long does it take the disk to come to a halt? Express your answer with the appropriate units.
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.
An 8.0-cm diameter hard disk spinning at 7200 rpm can stop in 19 revolutions.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
