Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them? [G = 6.67 X 10−¹¹ Nm² Kg²]

A. 3.50 x 10^-10N.
B. 3.71 X 10^-8N.
C. 3.57 x 10^-2N.
D. 4.00 x 10²N.

Correct Answer:

Option B = 3.71 X 10^-8N.

Explanation

The force of attraction between the two spheres is given by F (GM₁ M₂)/r² = (6.67X 10^-11 X5X10)/(0.3)²
= 3.71 X 10^-8N.