The both of a pendulum has mass m = 1 kg and charge `q = 40mu C`. Length of pendulum is = 0.9 m. The point of suspensison also has the same charge `40 muC`. What is the minimum speed u (in m/s) should be imparted to the bob so that it can complete vertical circle ?

A simple pendulum of bob of mass m and length L has one of its ends fixed at the centre O of a vertical circle, as shown in the figure. If 0=60^(@) at the point P , the minimum speed u that should be given to the bob so that it completes vetical circle is

A ball of mass m is attached to one end of a light rod of length l , the other end of which is hinged. What minimum velocity v should be imparted to the ball downwards, so that it can complete the circle ?

What minimum horizontal speed should be given to the bob of a simple pendulum of length l so tht it describes a complete circle?

A small ball of mass 2 xx 10^-3 kg , having a charge 1 mu C , is suspended by a string of length 0.8 m . Another identical ball having the same charge is kept at the point of suspension. Determine the minimum horizontal velocity that should be imparted to the lower ball so that it can make a complete revolution.

The bob of a simple pendulum of length 1 m has mass 100 g and a speed of 1.4 m/s at the lowest point in its path. Find the tension in the stirng at this instant.

The mass of a pendulum bob is m = 2kg and the length of the string is l. It is displaced through 90^(@) from the vertical and released. What minimum tension (in N) should the string should be able to withstand so that it doesn't break during motion?

The diagram show a small bead of mass m carrying charge q . The bead can freely move on the smooth fixed ring placed on a smooth horizontal plane . In the same pane a charge +Q has also been fixed as shown. The potential at the point P due to +Q is V . The velocity which the bead should projected from the point P so that it can complete a circle should be greater than .

One end of string of length 1.5 m is tied to a stone of mass 0.4 kg and the other end to a small pivot on a smooth vertical board. What is the minimum speed of the stone required at its lowermost.point so that the string does not slack at any point in its motion along the vertical circle ?

Figure shows an irregular wedge of mass m placed on a smooth horizontal surface. Part BC is rough. What minimum velocity should be imparted to a small block of same mass m so that it may each point B :

The bob of a simple pendulum has mass 2g and a charge of 5.0muC . It is at rest in a uniform horizontal electric field of intensity 2000V//m . At equilibrium, the angle that the pendulum makes with the vertical is: (take g=10m//s^(2) )