A phonograph record on a turntable rotates at 35 rev/min. What is the linear speed of a point on the record at the needle at: (a) the beginning and (b) the end of the recording? The distances of the needle from the turntable axis are 6 in and 9 in respectively at these two positions.
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 phonograph record on a turntable rotates at 35 rev/min. What is the linear speed of a point on the record at the needle at: (a) the beginning and (b) the end of the recording?
The distances of the needle from the turntable axis are 6 in and 9 in respectively at these two positions.
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