The figure below gives the angular speed versus time for a thin rodthat rotates around one end. The vertical axis is marked inincrements of 3 rad/s.
(a) What is the magnitude of the rod's angular acceleration?
Your answer is incorrect. rad/s2

(b) At t = 4.0 s, the rod has a rotationalkinetic energy of 2.15 J. Whatis its kinetic energy at t = 0?


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