Two blocks of masses m and 2 m are placed one over the other as shown in figure.The coefficient of friction between m and 2m is `mu` and between 2m and ground is `(mu)/(3)`. If a horizontal force F is applied on upper block and T is tension developed in string, then choose the incorrect alternative.

A block of mass m=4kg is placed oner a rough inclined plane as shown in figure. The coefficient of friction between the block and the plane is mu=0.5 . A force F=10N is applied on the block at an angle of 30^(@) .

Two blocks of Masses M and 2M are connected by a spring of stiffness k .The coefficient of friction between the blocks and the surface is mu Find the minimum constant force F to be applied to 2m in order to slide the mass M .

Two identical blocks of weigth w are placed one on top of the other as shown in figure. The upper block is tied to the wall. The coefficient of static friction between B and ground is mu and friction between A and B is absent. When F=mu w force is applied on the lower block as shown. The tension in the string will be

Two blocks of masses m_(1) and m_(2) are placed in contact with each other on a horizontal platform as shown in figure The coefficent of friction between m_(1) and platform is 2mu and that between block m_(2) and platform is mu .The platform moves with an acceleration a . The normal reation between the blocks is

Two blocks of masses m_(1) and m_(2) are placed in contact with each other on a horizontal platform as shown in figure The coefficent of friction between m_(1) and platform is 2mu and that between block m_(2) and platform is mu .The platform moves with an acceleration a . The normal reation between the blocks is

Two blocks of masses'm' and 'M' are arranged as shown in the figure. The coefficient of friction between the two blocks is ' mu ', where as between the lower block and the horizontal surface is zero. Find the force 'F' to be applied on the upper block, for the system to be under equilibrium ?

Two blocks of masses 'm' and and 'M' are arranged as shown in the The coefficient of friction between the two blocks is 'mu' , where as between the lower block and the horizontal surface is zero. Find the force 'F' to be applied on the upper block for the system to be under equilibrium ? .

A block of mass m is placed on another block of mass M lying on a smooth horizontal surface as shown in the figure. The co-efficient of friction between the blocks is mu . Find the maximum horizontal force F (in Newton) that can be applied to the block M so that the blocks together with same acceleration? (M=3kg, m=2kg, mu=0.1, g=10m//s^(2))