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

AI Thread Summary
To calculate angular acceleration, the final angular speed is needed, which is not provided in the problem. The equation ω(final) = ω(initial) + αt cannot be used effectively without knowing the final speed. Participants suggest clarifying the numbers used in calculations to identify errors. The discussion emphasizes the importance of having all necessary variables to solve for angular acceleration accurately.
xregina12
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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?
 
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Hi xregina12,

xregina12 said:
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.
 

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