Question

Two metal spheres of equal radius r at touching the force of attraction between them is

Answer 1

Answer:

Explanation:

If you keep three spheres touching each other the centres of the three will make a triangle whose three sides are equal to two times the radius of one sphere. therefore, the spheres centre will be distant by a length 2.radius

Answer 2

Answer:

Explanation:

attraction force between metal sphere is given by f = GMM/(2R)²

because separation between centre of the spheres is (R + R) = 2R

now, f = GM²/4R²

but given densities of both spheres are equal.

Let density of each sphere is

then, mass, M =

so, f =

f =

Here it is clear that force is directly proportional to R⁴ .