In the figure shown, a small ball of mass 'm' can move witgout sliding in a fixed semicircular track of radius R in vertical planet. It is released from the top. The resultant force on the ball at the lowest of the track is

In the figure a charged small sphere of mass m and the charge q starts sliding from rest on a vertical fixed circular smooth track of radius R from the position A shown. There exist a uniform magnetic field of B . Find the maximum force exerted by track on the sphere during its motion.

In the figure a charged small sphere of mass m and the charge q starts sliding from rest on a vertical fixed circular smooth track of radius R from the position A shown. There exist a uniform magnetic field of B . Find the maximum force exerted by track on the sphere during its motion.

A small block of mass m slides along a smooth frictional track as shown in the figure. If it starts from rest at P, what is the resultant force acting on it at Q?

A small block of mass m slides along a smooth frictional track as shown in the figure. If it starts from rest at P, what is the resultant force acting on it at Q?

A ball of mass m and radius r rolls inside a fixed hemispherical shell of radius R . It is released from rest from point A as shown in figure. The angular velocity of centre of the ball in position B about the centre of the shell is. .

A section of fixed smooth circular track of radius R in vertical plane is shown in the figure. A block id released from position A and leaves the treack at B The radius of curvanture of its trajectory just after it leaves the track B is ?