A flywheel (I = 42 kg · m2) starting from rest acquires an angular velocity of 194.3 rad/s while subject to a constant torque from a motor for 5.9 s. (a) What is the angular acceleration (in rad/s2) of the flywheel? (Enter the magnitude.) (b) What is the magnitude of the torque (in N · m)?
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 flywheel (I = 42 kg · m2) starting from rest acquires an
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