e A 12-g CD with a radius of 6.0 cm rotateswith an angular speed of 34 rad/s. (a) What is its kinetic energy?(b) If its kinetic energy is to be quadrupled, should its angularspeed be doubled, quadrupled, or increased by a factor of 16? (c)Calculate the angular speed required to quadruple the kineticenergy the CD had in part (a)
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.
e A 12-g CD with a radius of 6.0 cm rotates
with an angular speed of 34 rad/s. (a) What is its kinetic energy?
(b) If its kinetic energy is to be quadrupled, should its angular
speed be doubled, quadrupled, or increased by a factor of 16? (c)
Calculate the angular speed required to quadruple the kinetic
energy the CD had in part (a)
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