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BJU Physical Sci 12
BJU Physical Science Ch 12 6th edition
Term | Definition |
---|---|
centripetal force | A force that accelerates an object toward the center of a circular path. |
contact force | A force that acts only when one object touches another. |
dynamics | The branch of physics that studies forces and how they can change an object's motion. |
field force | A force that acts between objects that are not touching; also called force at a distance. |
force | A push or pull on an object. |
free-body diagram | A sketch that shows an object and the forces acting on it; also called a force diagram. |
friction | A contact force that works against the motion of objects trying to move past each other. |
gravity | A field force that acts between the masses of any two objects. |
inertia | The tendency of matter to resist changes in its motion. |
law of acceleration | The law that states that the acceleration of an object is directly proportional to the net force acting on the object and is inversely proportional to its mass; also called Newton's second law of motion. |
law of action-reaction | The law that states that for every action force, there is an equal and opposite reaction force; also called Newton's third law of motion. |
law of inertia | The law that states that objects at rest remain at rest and objects in motion continue in a straight line at a constant velocity unless acted on by a net external force; also called Newton's first law of motion. |
normal force | The force that acts in a direction that is perpendicular to the surface where two objects make contact. |
tension | A pulling force that is transmitted through a rope, chain, or similar object. |