A thread is wrapped around a cylindrical spool, of radius R = 2.0 cm, whose centralaxis is fixed on a support. Somebody’s hand pulls the thread off the spool. This causesthe spool to rotate. The acceleration of the person’s hand is constant. Starting fromrest, it takes 10 seconds for 5.0 meters of thread to be pulled off. What is the angularspeed of the spool at time t = 2.0 s?
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.
A thread is wrapped around a cylindrical spool, of radius R = 2.0 cm, whose centralaxis is fixed on a support. Somebody’s hand pulls the thread off the spool. This causesthe spool to rotate. The acceleration of the person’s hand is constant. Starting fromrest, it takes 10 seconds for 5.0 meters of thread to be pulled off. What is the angularspeed of the spool at time t = 2.0 s?
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