Motion in a Pla...

A body of mass m hangs at one end of a string of length l, the other end of which is fixed. It is given a horizontal velocity so that the string would just reach, where it makes an angle of 60^o with the vertical. The tension in the string at mean position is

In a vertical circle of radius r at what point in its path a particle has tension equal to zero if it is just able to complete the vertical circle

A body moving along a circular path of radius R with velocity v, has centripetal acceleration a,. If its velocity is made equal to 2v, then its centripetal acceleration is

A pendulum bob on a 2 m string is displaced 60^o from the vertical and then released. What is the speed of the bob as it passes through the lowest point in its path?

A fan is making 600 revolutions per minute. If after some time it makes 1200 revolutions per minute, then increase in its angular velocity is

A particle is tied to 20 cm long string. It performs circular motion in vertical plane. What is the angular velocity of string when the tension in the string at the top is zero?

A stone tied with a string is rotated in a vertical circle. The minimum speed with which the string has to be rotated

A fighter plane is moving in a vertical circle of radius \'r\'. Its minimum velocity at the highest point of the circle will be

A stone of mass m is tied to a string and is moved in a vertical circle of radius r making n revolutions per minute. The total tension in the string when the stone is at its lowest point is

As per given figure to complete the circular loop what should be the radius if initial height is 5 m