Given that the gravitational constant is 7 X 10-11 Nm2kg-2, what is the force of…

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.
    7×10-2N
  • D.
    7×103N
  • E.
    7×100N
Correct Answer: Option C
Explanation
F =

Gm1m2/r2

=

7 x 10-11 x 106 x 103/1m

= 7 x 10-2

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