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12C Forces Terms Pt1
Question | Answer |
---|---|
What is a force? | A push or a pull. Vector quantity. |
How do forces affect motion? | They cause objects to speed up, slow down, push them around corners or up hills. |
What is the force of gravity? | Force of attraction between any two objects with mass. |
What is the normal force? | Force perpendicular to surfaces of objects in contact. |
What is friction? | Force that acts on an object opposite to the object's motion or attempted motion. |
What is static friction? | Force that prevents stationary objects from starting to move. |
What is kinetic friction? | Force that acts against an object's motion. |
What is air resistance? | Friction that acts on an object moving through air. |
When is air resistance important: always, when objects are not moving, low speeds or high speeds? | At high speeds. |
What is tension? | Force exerted by strings, ropes, fibers, cables. |
What is applied force? | General term for any contact force. |
What are the units of force? | Newtons (N) |
What units make up a Newton? | Kilograms, meters, seconds |
Name some common forces that act on objects. | Force of gravity, normal force, friction, static friction, kinetic friction, air resistance, tension, applied force. |