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Combining the two proportionalities for acceleration yields which law?
ANewton's third law
BThe law of gravity
CNewton's second law
DNewton's first law
Answer & Solution
Correct answer: C. Newton's second law
1. The second law is derived from two experimental facts.
2. Acceleration is inversely proportional to mass.
3. Acceleration is linearly proportional to the net external force.
4. Combining the two proportionalities just given yields Newton's second law of motion.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 4 'Dynamics: Force and Newton's Laws of Motion', sections 4.1-4.8_
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