Angular Velocity and Acceleration in Physics Lab Experiment

Question:

How many revolutions does the rotating mirror go through when it gets to a 0 angular velocity along the way to its new speed?

Options:

A. Approximately 1166.8 revs

B. Approximately 1000 revs

C. Approximately 1200 revs

Answer:

The number of complete cycles the rotating mirror goes through before the angular velocity gets to zero is approximately 1166.8 revs.

Angular velocity is a fundamental concept in physics, representing the rate of change of angular displacement of an object with respect to time. In the given experiment scenario, the rotating mirror undergoes an angular acceleration from an initial velocity of 115 rad/s clockwise to counter clockwise over the course of 85 seconds.

To calculate the number of revolutions the mirror goes through when its angular velocity reaches zero, we can use the kinematic equations for angular velocity. By utilizing the equation ω = ω₀ + α·t, we can determine the time taken for the mirror to reach zero angular velocity along the way to its new speed.

In this experiment, the mirror would have turned through approximately 1166.8 revolutions when the angular velocity gets to zero, showcasing the principles of angular acceleration and velocity in action.

To delve deeper into the concepts of angular velocity and acceleration, you can explore more resources and examples through educational platforms or physics textbooks.