State Newton’s first law of motion with one real-life example.

Newton’s First Law of Motion: An object will remain at rest, or continue to move in a straight line at constant speed, unless acted upon by an external force.

Example: When you are sitting in a moving car and the car stops suddenly, your body tends to move forward. This happens because your body wants to stay in motion, but the sudden stop of the car applies a force to change your motion. This property is also called inertia.