If the radius of the Earth becomes half of its present value (mass remaining the same), the new length of the day would be:
Correct answer: A. 6 hours
- A. 6 hours
- B. 12 hours
- C. 48 hours
- D. 96 hours
Explanation
This is the following solution: T ∝ (1/2)2 T= 24 hours T= 24/ 4= 6 hours
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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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