Which force is responsible for the motion of falling bodies and the motion of planets around the Sun?
Correct answer: B. Gravitational force
- A. Nuclear force
- B. Gravitational force
- C. Electrostatic force
- D. Electromagnetic force
Explanation
A is correct. Gravitational force is the only force that is responsible for the motion of falling bodies and the motion of planets around the Sun.
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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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