Two spheres of masses 100kg and 90kg respectively have their centres separated by a distance of 1.0m. Calculate the magnitude of the force of attraction between them. [G = 6.70 x 10-11Nm-2kg-2]
-
A.
6.70 x 10-11N -
B.
6.70 x 10-10N -
C.
6.03 x 10-11N -
D.
6.03 x 10-7N
Correct Answer: Option D
Explanation
F = (frac{Gm_1m_2}{r^2} = 6.7 times 10^{11} times frac{100 times 90}{1^2} = 6.03 times 10^{-7}N)