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A thin plate of mass M, length L, and width 2d is mounted vertically on a frictionless axle along the z-axis, as shown. Initially the object is at rest. It is then tapped , which produces an angular impulse Ht with a hammer to provide a torque of the wdt about the z-axis of magnitude 
What is the angular speed plate about the z-axis after the tap?
The correct answer is:
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