The problem involves a disk rotating with constant angular acceleration, starting with an initial angular speed of 2π rad/s and reaching an angular speed of 7π rad/s after rotating through an angle of 10π rad. The focus is on determining the magnitude of the angular acceleration.
The discussion is ongoing, with participants exploring different equations and expressing confusion about the problem setup. Some guidance has been offered regarding the use of kinematic equations, but there is no consensus on the best approach yet.
Participants have noted the presence of multiple unknowns in the equations being considered, and there is a suggestion to review foundational concepts related to translational motion equations.
the first one has 2 unknowns and the second one is wrong...why not try one of the other kinematic equations for constant angular acceleration...the one that relates omega with alpha and theta?darlagatsch said:Homework Statement
a disk rotates with constant angular accel. the initial angular speed of the disc is 2pie rad/s. After the disk rotates through 10pie rad, the ang speed is 7pie rad/s.
Homework Equations
a. what is the mag of the angular accel?
The Attempt at a Solution
alpha=delta omega/delta time
omega=delta theta/delta time
etiher or both?
Well you seem to have known somehow that alpha=delta omega/delta time, how did you know that? You can find the equations on the link below, 4th slide:darlagatsch said:i have no idea! HELLLP