It is a measure of the reluctance of an object to change its state of motion when force is applied:
Correct answer: B. Inertial mass
- A. Mass
- B. Inertial mass
- C. Gravitational mass
- D. None of the above
Explanation
B is correct. Inertia is the measure of the reluctance of an object to change its state of motion when force is applied according to the 1st law of motion.
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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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