Question

multiple choice questions: choose the correct answer from the choices for each question. 1. which of the following best describes newton’s first law of motion? a) forces come in pairs. b) a change in motion is caused by unbalanced forces. c) an object at rest stays at rest unless acted on by a force. d) force equals mass times acceleration.

Explanation:

Newton's First Law of Motion (Law of Inertia) states that an object at rest remains at rest, and an object in motion remains in motion with a constant velocity, unless acted upon by a net external force. Let's analyze each option:

• Option a: Describes Newton's Third Law (action - reaction pairs).
• Option b: Describes the effect of unbalanced forces on motion, related to Newton's Second Law concepts but not the First Law.
• Option c: Matches the description of Newton's First Law, as it states an object at rest stays at rest unless a force acts on it (and also implies an object in motion stays in motion unless a force acts, though the option focuses on the at - rest part).
• Option d: Is Newton's Second Law ($F = ma$).

Answer:

c) An object at rest stays at rest unless acted on by a force.