A bead can slide along a straight rod The friction

Last updated: 6/21/2023

A bead can slide along a straight rod The friction coefficient between them is u At a certain moment t 0 the rod starts rotating about a perpendicular axis passing through its end At this moment the bead is at distance z from the rotation axis The space is free of gravity The angular velocity of the rod at any time t is co at where a is a positive constant The value of time t when the bead begins to move is A infinite B 4 a 2 3 D 2u a 3 C a 1 3