Question

Which of the following statements best defines Newton's First Law of Motion?

a) An object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by an external force.
b) Force is directly proportional to the change in momentum over time.
c) For every action, there is an equal and opposite reaction.
d) The rate of change of momentum of an object is directly proportional to the force acting on it.

Answer 1

Newton's First Law of Motion, also known as the law of inertia, states that an object will remain at rest or in motion with a constant velocity unless influenced by an external force.

Step-by-step explanation:

The correct definition of Newton's First Law of Motion is: An object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by an external force. This principle is also commonly referred to as the law of inertia. Inertia is the tendency of an object to maintain its state of rest or uniform motion in the absence of a net external force. This characteristic of inertia is inherently linked to the mass of the object.