Chapter 2 1-4 Science test
About this set
Created by:
SmileSmarty on November 4, 2010
Subjects:
forces, momentum, newtons laws of motion, gravity
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28 terms
Terms | Definitions |
|---|---|
 force | A push or a pull. |
| static, sliding, rolling, and fluid | 4 types of friction? |
| opposes motion | How does friction affect motion? |
| inertia | The tendency of an object to resist a change in motion. |
| momentum | The product of an object's mass and velocity. |
| Mass times velocity | Formula of momentum? |
| amount of mass and speed | What does momentum depend on? |
| Mass | amount of matter in an object |
| Net force divided by mass | Formula of acceleration |
| balanced forces | Equal forces acting on an object in opposite directions, no change in motion. |
| unbalanced forces | Forces that produce a non-zero net force, which changes motion. |
| Newton's first law | An object at rest remains at rest, an object in motion remains in motion, unless acted upon by an outside force. (also called law of inertia) |
| Newton's second law | Acceleration depends on net force and mass. |
| Newton's third law | For every action there is a equal and opposite reaction. |
| centripetal force | a force that keeps an object moving in an circle. |
| satellite | Any object that travels around another object in space. |
| newton | the SI unit of force |
| lemon | every newton is measured to be the same as a... |
| terminal velocity | when a falling object reaches this when forces of gravity and air resistance are balanced. |
| gravity | the force that pulls and accelerates objects toward the Earth. |
| add | if forces act together we do what to the net force? |
| subtract the smaller one from the larger one | if forces act against each other what do we do to the net force? |
| no motion | if forces are equal and opposite to each other what happens to the object? |
| weight | ________ is the gravitational force exerted on an object. |
| one newton | ____ ________ equal the force required to accelerate 1 kilogram of mass at 1 meter per second ² |
| free fall | when only gravity is acting upon a falling object. |
| air resistence | the kind of friction that slows a falling object |
| friction | the general term for the force that one surface exerts on another when they rub against each other |
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