A block of mass is kept on a moving surface. The static friction between the block and surface can be then
Find the minimum force 'F' and the angle 'α' at which it should be applied to a block of mass 'm' kept on a horizontal surface such that the block starts moving. Given that the coefficient of friction between the block and surface is μ.
A varying horizontal force F=at acts on a block of mass m kept on a smooth horizontal surface. An identical block is kept on the first block. The coefficient of friction between the blocks is µ. The time after which relative sliding between the blocks prevails is:
(a) 2mg/a (b) 2µmg/a (c) µmg/a (d) 2µmga