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Most Important Selected Qs for JEE AdvancedPhysicsRotational Motion

In the arrangement shown the rod is freely pivoted at point O and is in contact with the equilateral triangular block which can moves on the horizontal frictionless ground. As the block is given a speed v forward, the rod rotates about point O . Find the angular velocity of rod in rad/s at the instant when =30^ . [Take v=20 m / s , a =1 ~m ]

Correct answer

5

Step-by-step solution

AB = v d t ...(i) (along the circular arc) aligned & OA = AN & ds = rd aligned given vdt = OA d aligned & vdt = AN d & vdt = a d & d dt = v a ^2 & d dt =5 rad / s aligned

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