Explainer Zone on Instagram: "Newton’s First Law, also called the Law of Inertia, states that an object will remain at rest or continue to move in a straight line at constant speed unless acted upon by an external force. For example, when a car suddenly stops, the passengers inside tend to move forward. This happens because their bodies were in motion with the car and want to continue moving due to inertia, even though the car has stopped. Seat belts provide the external force needed to stop the