In fig. a small block is kept on m. then

In the small block m is kept on planck of mass M and a force F is applied on planck as shown in diagram then which of the following statements is/are correct .

A smooth hemisphere is kept fixed on a horizontal floor . A small block f mass m is kept on the tip of hemisphere . Block is slightly pushed and it is found that block leaves contact with the spherical surface when radius through the block makes and angle theta with the vartical . Calculate theta .

A varying horizental force F = at act 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 mu . The time after which the relative sliding between the blocks prevails is

A varying horizontal force F = at act 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 mu . The time after which the relative sliding between the blocks prevails is

There exists a uniform magnetic field in horizontal direction perpendicular to the plane of the paper as shown in Fig. A wire of length 1 and mass m is attached with a block of equal mass with the help of an ideal string. The block is kept on floor and the wire on two conducting support as shown. After closing the switch, a charge q passes though the wire for a small interval of time. To what height the block will rise? (take(qBl)/m = 20)

There exists a uniform magnetic field in horizontal direction perpendicular to the plane of the paper as shown in Fig. A wire of length 1 and mass m is attached with a block of equal mass with the help of an ideal string. The block is kept on floor and the wire on two conducting support as shown. After closing the switch, a charge q passes though the wire for a small interval of time. To what height the block will rise? (take(qBl)/m = 20)

Consider the spring block system shown in the figure. Initially block m is in equilibrium. Then block m is displaced b y a small distance h. Find the maximum speed of the block. ltbgt

A wedge of mass m_2 is kept on a spring balance. A small block of mass m_1 can move along the frictionless incline of the wedge. What is the reading of the balance while the block slides? Ignore the recoil of the wedge.