A light balloon filled with helium of density `rho_(He)` is tied to a long light string of length  and the string is attached to the ground. If the balloon is displaced slightly in the horizontal direction from the equilibrium and released then .

Two similar balloons filled with helium gas are tied to L m long string. A body of mass m is tied to another ends of the strings. The balloons float on air at distance r . If the amount of charge on the ballons is same then the magnitude of charge on each balloon will be

Two similar balloons filled with helium gas are tied to L m long string. A body of mass m is tied to another ends of the strings. The balloons float on air at distance r . If the amount of charge on the ballons is same then the magnitude of charge on each balloon will be

A balloon filled with helium or hot air can float in the atmosphere. A balloon filled with air from your lungs falls to the ground when it is released. Why do these balloons behave differently?

A paricle of mass m is tied to a light string of length L and moving in a horizontal circle of radius r with speed v as shown. The forces acting on the particle are

A small ball of mass 100 g is attached to a light and inextensible string of length 50 cm . The string is tied to a support O and the mass m released from point A which is a' a horizontal distance of 30cm from the support. Calculate the speed of the ball is its lowest point of the trajectory.

A small ball B of mass m is suspended with light inelastic string of length L from a block A of same mass in which can move on smooth horizontal surface as shown in the figure. The ball is displaced by angle theta from equilibrium position and then released. The displacement of centre of mass of A + B system till the string becomes vertical is

A small ball B of mass m is suspended with light inelastic string of length L from a block A of same mass in which can move on smooth horizontal surface as shown in the figure. The ball is displaced by angle theta from equilibrium position and then released. The displacement of centre of mass of A + B system till the string becomes vertical is

A wooden block or mass m and density rho is tied to a string, the other end of the string is fixed to bottom of a tank. The tank is filled with a liquid of density sigma with sigmagtrho . The tension in the string will be