How Do You Calculate Angular Acceleration from Initial Speed and Angle Change?

[xregina12]

The wheel on an upside down bike moves through 15 rad in 5 seconds. What is the wheel's angualr acceleration if its initial angular speed is 2.4 rad/s. Answer in units of rad/s^2

I used the equation ω(final) = ω(initial)+αt and solved for α however, I did not get a correct answer. Can anyone help?

 

[alphysicist]

Hi xregina12,

The wheel on an upside down bike moves through 15 rad in 5 seconds. What is the wheel's angualr acceleration if its initial angular speed is 2.4 rad/s. Answer in units of rad/s^2

I used the equation ω(final) = ω(initial)+αt and solved for α however, I did not get a correct answer. Can anyone help?

Can you show what numbers you used and what you did? They don't give you the final angular speed, so that equation by itself would have two unknowns.