Physics-
General
Easy

Question

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 Hwith a hammer to provide a torque of the wdt about the z-axis of magnitude H equals integral tau d t What is the angular speed plate about the z-axis after the tap?

  1. fraction numerator H over denominator 2 M d to the power of 2 end exponent end fraction    
  2. fraction numerator 2 H over denominator M d to the power of 2 end exponent end fraction    
  3. fraction numerator 3 H over denominator M d to the power of 2 end exponent end fraction    
  4. fraction numerator 4 H over denominator M d to the power of 2 end exponent end fraction    

The correct answer is: fraction numerator 3 H over denominator M d to the power of 2 end exponent end fraction

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