Two identical balls each have a mass of 10 g. What charges should these balls be given so that their interaction eq3ualizes the force of universal gravitation acting between them? The radii of the balls may be ignored in comparison to distance between them.

A mass is divided into two parts so that the force of gravitation between them is maximum. Find the ratio of the masses of the two parts.

The gravitational force between two bodies if 4 N. What will be the gravitational force between the bodies if the distance between them doubles?

What happens to the gravitational force between two objects if masses of both objects are doubled and distance beteen them is also doubled?

The gravitational force between two masses is F. If the distance between the masses is doubled. What will be the new force between them.

Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. What is the mutual force of electrostatic repulsion if the charge on each is 6.5 xx 10^-7 C ? The radii of A and B are negligible compared to the distance of separation. What is the force of repulsion if each sphere is charged double the above amount, and the distance between them is halved?

Two identical magnetic with a length 10 cm and weight 50 g of each are arranged freely with their like poles facing in a inverted vertical glass tube. The upper magnet hangs in the air above the lower one so that the distance between the nearest pole of the magnet is 3mm. Pole strength of the poles of each magnet will be

The distance between two equal balls having unlike charges is 2cm. The radii of the balls are much less than the distance between them. The balls attract each other with a force of 36xx10^(-5) N. After the ball have been connected by a wire and latter has been removed, the balls repel each other with a force of 20. 25xx10^(-5)N. Determine the original charges on the balls

Can two balls having same kind of charge on them attract each other? Explain.