| Term | Definition |
|---|
| a push or a pull on an object | Force |
| a force between two objects that are in contact with each other | Contact Force |
| a force applied to an object by another body that is not in contact with it | Non-contact force |
| the force of gravity acting upon an object | Weight |
| the quantity of matter in an object | Mass |
| kilograms (kg) | Mass is measured in______ (__) |
| Newtons (N) | Weight is measured in______ (__) |
| F=ma | Formula for force (_=__) |
| begin movement | Kicking a stationary soccer ball would... |
| Inertia | Newton's First Law of Motion is called the law of... |
| Acceleration | Newton's Second Law of Motion is called the law of... |
| Recoil | Newton's Third Law of Motion is called the law of... |
| action-reaction | A two-word summary of Newton's Third Law is... |
| 1. The object is stationary 2. The object is moving at a constant speed | Forces are always balanced if ( 1. __________ 2. ______________) |
| the tendency of an object to remain in its present state of motion | Inertia |
| The measure of the motion of a body | Momentum |
| p=mv | Formula for momentum (_=__) |
| the rate of change of velocity | Acceleration |
| v2-v1/t | Formula for acceleration (_____/_______) |
| a vector quantity which refers to the rate at which an object changes its position | Average Velocity |
| displacement/time taken | Average Velocity Formula |
| the total momentum of any group of objects remains the same unless outside forces act on the objects | The Law of Conservation of Momentum states that... |
| A device which changes the size and/or direction of a force needed to do work | Machine |
| basic devices that perform work with only one movement. They transfer energy from the effort to the load | Simple Machines are... |
| a rigid bar that rotates about a pivot called a fulcrum | Lever |
| 3 | There are ___ classes of levers |
| The point on which the bar is resting-the pivot point. The rigid bar rotates about this point. Every lever MUST contain a fulcrum | Fulcrum |
| The mass or object being lifted or moved by the lever | Load |
| The amount of work performed on the lever to achieve the desired movement of the load | Effort |
| the part of the lever between the effort and the fulcrum | Effort Arm |
| the part of the lever between the fulcrum and the load | Load Arm |
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