Calculating Angular Velocity and Time in a Frustrating Problem

AI Thread Summary
The problem involves a wheel that starts from rest and has a constant angular acceleration of 1.20 rad/s², turning through 32.5 rad in a 5.00 s interval. To find the time before this interval began, the kinematic equation for rotational motion can be applied, substituting angular displacement and initial angular velocity accordingly. The final angular velocity at the start of the interval can also be calculated using the angular acceleration formula. By solving these equations, the necessary time and angular velocity can be determined. This approach effectively utilizes the principles of kinematics in rotational motion.
kiwinosa87
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This is the last problem that is frustrating me...

A wheel, starting from rest, rotates with a constant angular acceleration of 1.20 rad/s2. During a certain 5.00 s interval, it turns through 32.5 rad. (a) How long had the wheel been turning before the start of the 5.00 s interval? (b) What was the angular velocity of the wheel at the start of the 5.00 s interval?

Any help would be appreciated!
 
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Hint:

You can apply the formula that you use for the rectilinear movement:

\Delta x = V_0t+\frac{1}{2}at^2

and

V_f=at

Replacing

\Delta x for \Delta \theta

V_0 for \omega_0

\alpha for a

bye
 
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