A small ball with mass 1.30 kg is mounted on one end of a rod0.780 m long and of negligible mass.The system rotates in a horizontalcircle about the other end of the rod at 5010 rev/min. (a) Calculatethe rotational inertia of the system about the axis of rotation. (b)There is an air drag of 2.30* 10-2 N on the ball, directed opposite itsmotion.What torque must be applied to the system to keep it rotatingat constant speed?
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 small ball with mass 1.30 kg is mounted on one end of a rod
0.780 m long and of negligible mass.The system rotates in a horizontal
circle about the other end of the rod at 5010 rev/min. (a) Calculate
the rotational inertia of the system about the axis of rotation. (b)
There is an air drag of 2.30* 10-2 N on the ball, directed opposite its
motion.What torque must be applied to the system to keep it rotating
at constant speed?
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