In the shown figure, a small mass m starts sliding down a smooth and stationary circular track. Which of the following graph best represents the variation of magnitude of the force applied by the track on the mass and the angle `theta`?

A block of mass m slides down a smooth vertical circular track. During the motion, the block is in

A block of mass m slides down a smooth vertical circular track. During the motion, the block is in:

A block of mass m slides down a smooth vertical circular track. During the motion, the block is in

A block of mass m slides down a smooth vertical circular track. During the motion, the block is in

A railway engine whistiling at a constant frequency moves with a constant speed. It goes past a stationary observer beside the railyway track. Which of the following graphs best represent the variation of frequnecy of the sound (n) heard by the observer with the time (t) ?

A bead of mass m is released from rest at A to move along the fixed smooth circular track as shown in figure. The ratio of magnitudes of centripetal force and normal reaction by the track on the bead at any point P_0 described by the angle theta(!=0) would

A bead of mass m is released from rest at A to move along the fixed smooth circular track as shown in figure. The ratio of magnitudes of centripetal force and normal reaction by the track on the bead at any point P_0 described by the angle theta(!=0) would

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 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