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0C-Force & Motion
0C Changes in Force and Motion
| Term | Definition |
|---|---|
| accelerate | a change in motion caused by an unbalanced force (speed up, slow down, start, stop, and turn) |
| balanced force | forces in opposite direction with the same magnitude |
| direction | a straight path that an object can travel |
| force | a push or a pull |
| force arrow | an arrow that indicates the size and direction of a force |
| formula for force | force = mass x acceleration |
| Free-Body Diagram | an illustration showing all of the forces acting on one object or system |
| friction | the force that resists motion |
| static friction | the resistance between two or more solid objects that are not moving relative to each other |
| sliding friction | the resistance created by two objects sliding against each other |
| rolling friction | the resistance from the motion when wheels are used on a surface |
| fluid friction | the resistance from the movement of a body through a liquid or gas |
| inertia | the tendency of an object to resist a change in motion |
| net force | the sum of all forces acting on an object |
| Newton | SI unit of force (N) |
| Newton's First Law | an object at rest stays at rest, an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. |
| Newton's Second Law | the amount of force needed to accelerate an object depends on the object’s mass. (force equals mass times acceleration (f = ma)) |
| speed | the distance an object travels per unit of time |
| unbalanced force | forces that cause a change in motion |
| velocity | speed in a given direction |
| applied force | a force that is applied to an object by a person or another object |
| air resistance | a force that is caused by pushing air |
| buoyancy | the force exerted on an object that is wholly or partly immersed in a fluid |
| elastic force | the force that allows some materials to return to its original shape after being stretched or compressed |
| friction force | the resistance force exerted by a surface as an object moves across or through it |
| gravity | a force that attracts any two objects with mass |
| magnetic force | attraction or repulsion that arises between electrically charged particles |
| normal force | the support force exerted upon an object that is in contact with another stable object |
| spring force | the force exerted by a compressed or stretched spring |
| tension force | a force developed in a rope, string, or cable when stretched under an applied force |
| F.app | applied force |
| F.air | air resistance |
| F.buo | buoyancy |
| F.ela | elastic force |
| F.fri | friction force |
| F.grav | gravity |
| F.mag | magnetic force |
| F.nor | normal force |
| F.spr | spring force |
| F.ten | tension force |
| F.sta | static electricity |
| static electricity | the atraction or repulsion between objects with electrical charges |
Created by:
PRO Teacher
lsiefert
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