An electric motor rotating a workshop grinding wheel at a rate of 1.27 ✕ 102 rad/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.80 rad/s2. (a) How long does it take for the grinding wheel to stop? (answer in s) (b) Through how many radians has the wheel turned during the interval found in (a)? (answer in rad)
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 electric motor rotating a workshop grinding wheel at a rate of 1.27 ✕ 102 rad/min is switched off. Assume the wheel has a constant negative
(a) How long does it take for the grinding wheel to stop? (answer in s)
(b) Through how many radians has the wheel turned during the interval found in (a)? (answer in rad)
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