In the figure, what should be mass m so that block A slides up with a constant velocity ?

In the block moves up with constant velocity v m/s. Find F

In the arrangement shown in figure what should be the mass of block A , so that the system remains at rest ? Neglect friction and mass of string.

In the arrangement shown in figure what should be the mass of block A , so that the system remains at rest ? Neglect friction and mass of string.

Two block of masses M_(1) and, M_(2) are connected with a string which passed over a smooth pulley . The mass M_(1) is placed on a tough inclined plane as shown in figure .The coefficient of friction between and block and the inclined plane is mu what should be the minimum mass M_(2) so that the block M_(1) slides upwards?

Two block of masses M_(1) and, M_(2) are connected with a string which passed over a smooth pulley . The mass M_(1) is placed on a tough inclined plane as shown in figure .The coefficient of friction between and block and the inclined plane is mu what should be the minimum mass M_(2) so that the block M_(1) slides upwards?

A block of mass m is kept on an inclined plane of a lift moving down with acceleration of 2m//s^(2) . What should be the coefficient of friction for the block to move down with constant velocity relative relative to lift?