A man standing in an elevator is acted upon by:
Correct answer: C. Two forces
- A. Four forces
- B. Three forces
- C. Two forces
- D. One force
Explanation
In some situations, we may simplify the analysis to consider only two forces: gravity and the normal force. If the elevator is not accelerating vertically, the net force is zero, and the normal force equals the force of gravity, resulting in no vertical motion.
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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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