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
Verified Correct Answer: D.
Physical Principles & Numerical Solution
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
Source: Myschool Past Questions Archive (Record #33424)