Given that the gravitational constant is 7 X 10-11 Nm2kg-2, what is the force of attraction between 106kg mass of lead hanging one metre away from a 103kg mass of iron?
A
7 x10-20N
B
7 x 10-5N
C
7x10-2N
D
7x103N
E
7x100N
Verified Correct Answer: C.
Physical Principles & Numerical Solution
F = Gm1m2/r2 = 7 x 10-11 x 106 x 103/1m = 7 x 10-2
Source: Myschool Past Questions Archive (Record #24117)