Given that the gravitational constant is 7 X 10... - WAEC Physics 1990 Question
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
correct option: c
F =
Gm1m2/r2 =
7 x 10-11 x 106 x 103/1m = 7 x 10-2
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