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vocab
| Question | Answer |
|---|---|
| Referance point | a point at which other points refer to |
| motion | an object's change in position relative to the referance point |
| speed | the distance traveled by an object divided by the time it took the travel that distance. |
| velocity | the speed of an object in a particular direction |
| acceleration | the rate at which velocity changes over time |
| centripal acceleration | acceleration that occurs in a circular motion |
| force | a push or pull |
| Newton | the SI unit for force |
| net force | the combination of all of the forces acting on an object |
| balanced force | when the net force on an object is 0 N |
| unbalanced force | when the net force on an object in not 0 N |
| friction | a force that opposes motion between two surfaces that are in contact |
| kinetic energy | friction between moving surfaces |
| static friction | when a force is applied to an object does not cause the object to move |
| lubricants | substances that are applied to surfaces to reduce the friction between the surfaces |
| gravity | a force of attraction between objects that is due to their masses. |
| weight | a measure of the gravitational force on an object |
| mass | the amount of matter in an object... DOESNT CHANGE |
| terminal velocity | the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity |
| air resistance | the force that opposes the motion of objects through air |
| free fall | the motion of a body when only the force of gravity is acting on the body |
| projectile motion | the curved path an objects follows when it is thrown near the center of the earth |
| inertia | the tendancy of all objects to resist any change in motion |
| momentum | how easy or hard it is to stop |
| work | when a force causes an object to move in the direction of the force |
| power | the rate at which work is done or energy is transformed |
| machine | a device that makes work easier by changing the size or direction of a force |
| work input | the work you do on a machine |
| work output | the work done by the machine |
| input force | the force i apply |
| output force | the force the machine applies |
| mechanical advantage | the number of times the machine multiplies force |
| mechanical efficiency | a comparison of a machine's work output with the work input |
| ideal machine | a machine that is 100% efficient |
| energy | the ability to do work |
| potential energy | the energy an object has because of it position |
| mechanical energy | total energy of motion and position of an object |
| friction | a forces that opposes motion between two surfaces that are touching |
Created by:
irelandlittlewarrior
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