Newton's First Law, also known as the Law of Inertia, states that an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by a force. Inertia is the tendency of an object to resist changes in its state of motion. The more massive an object is, the greater its inertia.
In simpler terms, things like to keep doing what they're already doing. If something's sitting still, it wants to stay still. If it's moving, it wants to keep moving at the same speed and direction. A force is needed to change this state.
Match the terms with their definitions:
| Term | Definition |
|---|---|
| 1. Inertia | A. A push or pull that can change an object's motion. |
| 2. Force | B. The tendency of an object to resist changes in its state of motion. |
| 3. Newton's First Law | C. The amount of matter in an object. |
| 4. Mass | D. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a force. |
| 5. Motion | E. The act or process of moving; a change in position. |
Match the correct term to its definition: 1-B, 2-A, 3-D, 4-C, 5-E
Complete the following paragraph using the words: inertia, force, motion, rest, mass.
An object will remain at ______ or in constant ______ unless a net ______ acts upon it. This resistance to change in motion is called ______. The amount of ______ an object has is related to its ______.
Answers: rest, motion, force, inertia, motion, mass
Explain, using Newton's First Law, why it's important to wear a seatbelt in a car. 🚗
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