14. According to Newton's First Law of Motion... a. An object in motion will slow down when moving down a hill. b. An object in motion will stay in motion unless acted upon by an outside force. c. An object in motion will always move sideways when acted upon by an outside force. d. An object in motion will stay in motion when it is acted upon by an outside force.

Newton's First Law of Motion, often referred to as the Law of Inertia, tells us that an object at rest will remain at rest, and an object in motion will continue in its motion at a constant velocity and in a straight line unless acted on by a net external force. This principle underpins so much of physics — for instance, imagine a soccer ball rolling on a perfectly frictionless surface; it would keep going, but alas, friction is always there to eventually bring it to a stop! A great way to see this law in action is by considering everyday scenarios. For example, when you’re riding in a car that suddenly stops, your body lurches forward because it wants to continue moving at the same speed due to inertia. This is why seat belts are essential; they provide the necessary force to keep you safe in such situations. So next time you buckle up, remember, you're not just strapping in; you're working with Newton's laws!