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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A long horizontal rod has a bead which can slide along its length and is initially placed at a distance L from one end A of the rod.The rod set in angular motion about A with a constant angular acceleration a .If the coefficient of friction between the rod and the bead is u and gravity is neglected then what is the time after which the bead starts slipping is

A long horizontal rod has a bead which can slide along its length and is initially placed at a distance L from one end A of the rod.The rod set in angular motion about A with a constant angular acceleration a .If the coefficient of friction between the rod and the bead is u and gravity is neglected then what is the time after which the bead starts slipping is

A block of mass 0.1 kg is held against a wall applying a horizontal force of 5 N on the block. If the coefficient of friction between the block and the wall is 0.5 the magnitude of the frictional force acting on the block is