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Most Important Selected Qs for JEE AdvancedPhysicsRotational Motion

A uniform rod of mass M is released from horizontal position as shown in the figure. The rod is free to rotate about a horizontal frictionless axis passing through hinge P . The reaction from the hinge just after the release is Mg / K . Find the value of K .

Correct answer

4

Step-by-step solution

aligned & = / l = ( Mg L 2 / ML ^2 3 )= 3 2 ~g ~L & a _ cm = L / 2=3 ~g / 4= Mg - N M & N = Mg 4 aligned

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