Friction

Two blocks are connected over a massless pulley as shown in figure. The mass of block A is 10 kg and the coefficient of kinetic friction is 0.2. Block A slides down the incline at constant speed. The mass of block B in kg is: 

In the figure, two blocks are separated by a uniform strut attached to each block with frictionless pins. Block weighs 400 N, Block weighs 300 N, and the strut weighs 200 N. If under , determine the minimum coefficient of friction under to prevent motion. 

The masses of blocks and are and respectively. Between and there is a constant frictional force . Block can slide on a smooth horizontal surface. is set in motion with velocity while is at rest. What is the distance moved by relative to before they move with the same velocity? 

Block A of mass m and block B of mass 2m are placed on a fixed triangular wedge by means of a massless, inextensible string and a frictionless pulley as shown in the figure. The wedge is inclined at 45° to the horizontal on both sides. If the coefficient of friction between block A and the wedge is (2)/(3) and that between block B and the wedge is (1)/(3), and both blocks A and B are released from rest, the acceleration of A will be: 

In the figure, two blocks are separated by a uniform strut attached to each block with frictionless pins. Block A weighs 400 N, block B weighs 300 N, and the strut AB weighs 200 N. If μ = 0.25 under block B, determine the minimum coefficient of friction under A to prevent motion. 

The masses of blocks A and B are m and M respectively. Between A and B, there is a constant frictional force F and B can slide on a smooth horizontal surface. A is set in motion with velocity v₀ while B is at rest. What is the distance moved by A relative to B before they move with the same velocity?