Question

A sphere of mass 25 kg attracts another sphere of mass 24 kg with a force of 0.1 mg wt.

What will be the distance between the two spheres?
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Answer 1

According to Newton's theory :

Force of attraction between particles is directly proportional to product of masses of particles and inversely proportional to square of the distance between the particles.

F = G(m1)(m2)/(r^2)

where G is gravitational constant.

value of G is 6.67 × 10^(-11) m^3 kg^-1 s^-2

0.1/10^6 = 6.67 × 10^(-11) × 25 × 24/r^2

0.1 × r^2 = 6.67 × 10^(-5) × 25 × 24

r^2 = 6.67 × 10^(-4) × 600

r^2 = 667 × 6 × 10^(-4)

r = 0.64 m nearly

I hope my calculation is not wrong.

If wrong I'm sorry.

But process is correct.