The best summary of Newton's laws is:
b. Newton's 1st Law: Balanced Forces & Inertia
Newton's 2nd Law: Unbalanced Forces & Fnet = ma
Newton's 3rd Law: action/reaction force pairs
Here's the breakdown:
- Newton's 1st Law states that an object at rest stays at rest, and an object in motion stays in motion at constant velocity unless acted upon by a net external force (which relates to inertia and balanced forces).
- Newton's 2nd Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (Fnet = ma), which relates to unbalanced forces.
- Newton's 3rd Law states that for every action, there is an equal and opposite reaction, which pertains to action/reaction force pairs.
Option b accurately captures the essence of each of Newton's laws.
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