Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Work, Force and Moti
| Term | Definition |
|---|---|
| Work | Force placed on an object that causes it to move. |
| Force | A push or a pull |
| Motion | The result of unbalanced forces being applied to an object. A change in position relative to a reference point. |
| mass | A measure of the amount of matter in an object |
| weight | A measure of the force of gravity on an object |
| gravity | A force of attraction between objects that is due to their masses. |
| inertia | An objects resistance to change its motion |
| Newton's First Law of Motion | an object in motion will remain in motion and an object at rest will stay at rest unless acted upon by another force. Also called the LAW OF INERTIA! |
| Newton's Second Law of Motion | The greater the mass, the smaller the acceleration for a given force. Force is the product of mass and acceleration. Also called the LAW OF ACCELERATION! |
| Newton's Third Law of Motion | for every action there is an equal and opposite reaction |
| speed | Distance traveled per unit time. |
| velocity | Speed in a given direction |
| acceleration | Any change in velocity (increasing speed, decreasing speed or changing directions) |
| deceleration | A decrease in speed. Also called negative acceleration. |
| energy | Ability to do work |
| friction | A force that resists motion |
| Simple machines | a machine with few moving parts, making it easier to do work (there are 6: lever, pulley, wheel and axle, inclined plane, wedge, and screw) |
| pulley | A grooved wheel with a rope, chain, or cable running along the groove. Works by changing the direction of the force. |
| inclined plane | A flat surface set at an angle used to help raise or lower objects. |
| wedge | A device that is thick at one end and has a thin edge at the other end. Often used to split objects apart. |
| screw | An inclined plane wrapped around a cylinder. Used for holding things together or lifting objects. |
| wheel and axle | A large wheel with a rod through its center. Reduces the friction of moving something. |
| distance | A measure of far something has moved. |
| Joule | The SI unit of measurement for Work |
| machine | device that makes work easier by increasing the force applied to an object, by changing the direction of an applied force, or by increasing the distance over which a force can be applied. |
| Power | Amount of work being done, or the amount of energy transferred, in a certain amount of time, measured in watts, W. |
| Balanced forces | Equal forces acting on an object in opposite directions. Net force equals zero. Results in no movement occurring. |
| unbalanced forces | Forces acting on an object that combine and form a net force that is not zero. Results in movement occurring. |
| lever | A rigid bar that is free to move around a fixed point. Used to lift objects |
| Newtons | The SI unit of measurement for Force |
| Watts | The SI unit of measurement for Power |
Created by:
user-1974052
Popular Physical Science sets