Four balls, each with mass m, are connected by four nonconducting strings to from a square with side with A, as shown in (Fig. 3.43.) The assembly is placed on a horizontal nonconducting frictionless surface. Balls 1 and 2 each have charge q, and balls 3 and 4 are uncharged. Find the maximum speed of balls 1 and 2 after the string connecting them is cut.
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Four blocks each of mass M connected by a massless strings are pulled by a force F on a smooth horizontal surface, as shown in figure.

A ball of mass 1.00 kg is attached to a loose string fixed to a ceiling. The ball is released from rest and falls 2.00 m, where the string suddenly stops it. Find the impulse on it from the string.

A boy revolves two balls each of mass 100 gm and tied with strings of 1 metre length each in horizontal circle as shown in figure. If the speed of outermost ball is 6 m/s , then tension in string-1 is-

Two identical pith balls, each carrying charge q, are suspended from a common point by two strings of equal length l. Find the mass of each ball if the angle between the strings is 2theta in equilibrium.

Two indentical pith balls, each carrying charge q, are suspended from a common point by two strings of equal length l. Find the mass of each ball if the angle between the strings is 2theta in equilibrium.

Two indentical pith balls, each carrying charge q, are suspended from a common point by two strings of equal length l. Find the mass of each ball if the angle between the strings is 2theta in equilibrium.

Two identical pith balls, each carrying charge q, are suspended from a common point by two strings of equal length l. Find the mass of each ball if the angle between the strings is 2theta in equilibrium.

Two small balls A and B are interconnected by an inextensible string of legth L. Mass of ball A =m, mass of ball B = m. the balls are resting on a frictionlesss harixontal surgace , with the distance between them =3L.5 In this position ball A is suddenly given a harizontal velocity v_(0) perpendicular to the line joining the two balls. (see fig 4E . 18 (a)) (a) Find the speed of ball B houst after the string becomes taut (b) find the impulse of the tension in string when the string becomes taut. (c) Find the steady tension in string much after the string has become taut.

A ball of mass 0.5 kg is attached to a light string of length 2m. The ball is whirled on la horizontal smooth surface is a circle of rdius 2 m as shown in fig. If the string can withstand tension up to 100 N, what is the maximum speed at which the bal can be whirled.

Radius of an iron is 2 cm. The ball is kept at rest on a frictionless horizontal surface. Another ball of radius 4 cm ,moving with velocity 81 cm*s^(-1) , collides with it. Find the velocities of both the balls after collision.