Physics Vocab

1. The force that acts to resist the relative motion (or attempted motion) of objects or materials that are in contact.
5. SI unit of force.
7. A diagram showing all the forces acting on an object.
10. The reluctance of any body to change its state of motion.
11. The combination of all the forces that act on an object. Flying mammal
12. An arrow whose length represents the magnitude of a quantity and whose direction represents the direction of the quantity.
15. That which exists in the space surrounding a mass, electric charge, or magnet, so that another mass, electric charge, or magnet introduced to this region will experience a force.
16. A measure of an object's inertia; also a measure of the amount of matter in an object.

2. Point at the center of an object's mass distribution, where all its mass can be considered concentrated.
3. The vector sum of two or more component vectors.
4. Any influence that tends to accelerate an object; a push or pull.
6. How fast something is moving; the path of distance moved per time. The magnitude of the velocity vector.
8. The rate at which velocity is changing.
9. The force on a body due to the gravitational attraction of another body.
13. In general, a state of balance-the object is moving at a constant velocity or is at rest (net force = 0).
14. For an object resting on a horizontal surface, the upward force that balances the weight of the object; also called the support force.