JEE Main Physics question
A long horizontal rod has a bead which can slide along its length, initially placed at a distance from one end of the rod. The rod is set into angular acceleration about . If the coefficient of friction between the rod and the bead is , and gravity is neglected, then the time after which the bead starts slipping is
Answer: (A)
Solution
Tangential acceleration of the bead , so the normal (constraint) force needed from the rod is and friction available is . The bead starts slipping when
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