Which of the following is a measure of how fast an object is rotating about a fixed axis?*1 pointA . Linear velocityB . Angular velocityC . Tangential velocityD . Centripetal velocity
Question
Which of the following is a measure of how fast an object is rotating about a fixed axis?*1 pointA . Linear velocityB . Angular velocityC . Tangential velocityD . Centripetal velocity
Solution
The measure of how fast an object is rotating about a fixed axis is B. Angular velocity.
Here's why:
A. Linear velocity is the rate at which an object moves along a path in a straight line.
B. Angular velocity is the rate of change of an angle per unit of time, in other words, the speed of rotation around a fixed axis.
C. Tangential velocity is the linear speed of something moving along a circular path.
D. Centripetal velocity doesn't exist. There's centripetal force, which is the force that makes a body follow a curved path, but it's not a measure of speed or velocity.
So, the correct answer is B. Angular velocity.
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