Two balls of mass m each are hung side by side by side by two long threads of equal length l. If the distance between upper ends is r, show that the distance r' between the centres of the ball is given by `g r'^(2)(r-r')=2l G m`

Two small balls of mass m each are suspended side by side by two equal threds to length L. If the distance between the upper ends of the threads be a, the angle theta that the threads will make with the vertical due to attraction between the balls is :

Two small balls of mass m each are suspended side by side by two equal threds to length L. If the distance between the upper ends of the threads be a, the angle theta that the threads will make with the vertical due to attraction between the balls is :

Two similar balls are suspended from a point by two silk thread, each of length l. Each ball of mass m contains q amount of charge. If the angle between the two threads is very small, show that the distance between the centres of the two balls at equilibrium is x=((2q^(2)l)/(mg))^(1//3)

For two circles of radii r and R, the distance between their centres is d. What type of circles are they, if d lt R +r ?

R and r are the radius of two circles (R gt r) . If the distance between the centre of the two circles be d , then length of common tangent of two circles is

Two small identical balls, each of mass 0.20 g, carry identical charges and are suspended by two threads of equal lengths. The balls position themselves at equilibirum such that the angle between the threads is 60^(@) . If the distance between the balls is 0.5 m, find the charge on each ball.

R and r are the radii of two circles (R > r). If the distance between the centres of the two circles be d, then length of common tangent of two circles is

IF two circles of radii r_1 and r_2 (r_2gtr_1) touch internally , then the distance between their centres will be

IF two circles of radii r_1 and r_2 (r_2gtr_1) touch internally , then the distance between their centres will be