Two objects of masses 80kg and 50kg are separated by a distance of 0.2m. If the gravitational constant is 6.6 x 10-11Nm kg, calculate the gravitational attraction between them.
-
A.
4.9 x 10-9N -
B.
1.3 x 10-6N -
C.
6.6 x 10-8N -
D.
6.6 x 10-6N -
E.
2.6 x 10-9N
Correct Answer: Option D
Explanation
F = (frac{Gm_1m_2}{r^2} = frac{6.6 times 10^{-11} times 80 times 50}{0.2 times 0.2})
= 6.6 x 10-6N