A DVD which has a diameter of 12 cm is initially at rest so that the line PQ on the disc’s surface is along the +x-axis. The disc begins to turn with a constant angular acceleration az = 5 rad/s^2. a.) At t = 0.40 s, what is the angle between the line PQ and the +x-axis? b.) At t = 0.40 s, what is the linear velocity in m/s of a point on the rim?
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 DVD which has a diameter of 12 cm is initially at rest so that the
line PQ on the disc’s surface is along
the +x-axis. The disc begins to turn
with a constant
a.) At t = 0.40 s, what is the angle
between the line PQ and the +x-axis?
b.) At t = 0.40 s, what is the linear velocity in m/s of a point on the rim?
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