Compute the gravitational force of attraction between two balls each weighing 10 kg when placed at a distance of 1 metre apart.
Correct answer: E. 667.3 x 10^-11 N
- A. 66 x 10 -2 N
- B. 77 x 10 -7 N
- C. 81.9 x 10 -7 N
- D. 31.4 x 10^-6 N
- E. 667.3 x 10^-11 N
Explanation
According to gravitational law: F= G m1m2/ r2 F = (6.674x 10^-11)(10)(10)(1)2 F = 667.4x 10^-11 N Option E is correct. As this question is theroretical options A, B, C and D are incorrect.
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About Gravitation
Newton’s law of universal gravitation relates the force between masses to their masses and separation, while gravitational field strength explains weight and orbital motion. The topic covers satellite velocity and period, escape ideas, weightlessness in free fall, and artificial gravity, which differs from ordinary gravitational attraction.
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