Newton's First Law of Motion states that an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity unless acted upon by an unbalanced external force. This law emphasizes the concept of inertia, which is the tendency of an object to resist changes in its state of motion.
To summarize:
- An object stays at rest unless a force acts on it.
- An object in motion stays in motion at a constant velocity unless it encounters an unbalanced force.
The other statements you provided refer to Newton's Second Law and Third Law of Motion:
- Newton's Second Law states that the acceleration of an object depends on the mass of the object and the amount of force applied. (F = ma)
- Newton's Third Law states that for every action, there is an equal and opposite reaction.