In fig. the block of mass M is at rest on the floor . At what acceleration with which should a boy of mass m climb along the rope of negligible mass so as to lift the block from the floor?

Block A of mass 35 kg is resting on a frictionless floor.

A rope of negligible mass passes over a pulley of negligible mass attached to the ceiling, as shown in figure. One end of the rope is held by Student A of mass 70 kg , who is at rest on the floor. The opposite end of the rope is held by Student B of mass 60 kg , who is suspended at rest above the floor. The minimum acceleration a_(0) with which the Student B should climb up the rope to lift the Student A upward off the floor. (g=10m//s^(2))

A rope of negligible mass passes over a pulley of negligible mass attached to the ceiling, as shown in figure. One end of the rope is held by Student A of mass 70 kg , who is at rest on the floor. The opposite end of the rope is held by Student B of mass 60 kg , who is suspended at rest above the floor. The minimum acceleration a_(0) with which the Student B should climb up the rope to lift the Student A upward off the floor. (g=10m//s^(2))

A rope of negligible mass passes over a pulley of negligible mass attached to the ceiling, as shown in figure. One end of the rope is held by Student A of mass 70 kg , who is at rest on the floor. The opposite end of the rope is held by Student B of mass 60 kg , who is suspended at rest above the floor. The minimum acceleration a_(0) with which the Student B should climb up the rope to lift the Student A upward off the floor. (g=10m//s^(2))

With what acceleration a should the box of figure descends so that the block of mass M exerts a force Mg/4 on the floor of the box?

With what acceleratin a should the box of figure desecend so that the block of mass M exerts a force Mg/4 on the floor of the box?

With what acceleration 'a' should the box of figure moving up so that the block of mass M exerts a force 7Mg//4 on the floor of the box?

With what acceleration 'a' should a box descend so that a block of mass M placed in it exerts force Mg/4 on the floor of the box?

With what acceleration 'a' should a box descend so that a block of mass M placed in it exerts force Mg/4 on the floor of the box?