Question

Two spheres each other of mass 20 Kg are 2 m apart. Calculate the value of attraction between them if G= 6.67multiply 10®-11

Answer 1

Answer:

The force of attraction will be 667 × 10⁻¹¹ N

Explanation:

According to the universal law of gravitation, the force of attraction between two objects will be directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Its mathematical expression is:

                                              F = G Mm / d²

Where F is the force of attraction, G is the universal gravitational constant, M and m are the masses of the objects and d is the distance of separation between the objects.

We have, G = 6.67 × 10⁻¹¹ Nm²/kg²

                M = m= 20 kg

                 d = 2 m

∴ F = (6.67 × 10⁻¹¹ × 20 × 20) / 2²

  F = 667 × 10⁻¹¹ N