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Force, Motion,SM
Force, Motion, and Simple Machines
| Term | Definition |
|---|---|
| Simple Machines | Help people do work by changing a force. *make work easier by changing the direction and amount of force it takes to move the object |
| Compound Machine | Device made up of two or more simple machines |
| Wedge | Simple machine made of two inclined planes Example. Shovel, knife, doorstop, ax |
| Inclined Plane | Simple machine made up of a slanted surface *Examples: slide, ramp, stairs, roller coaster |
| Lever | Simple machine made up of a stiff bar that moves freely around a fixed point (fulcrum). *Examples: seesaw, broom, toilet flusher, baseball bat |
| Wheel and Axle | Simple machine made up of two cylinders that turn on the same axis *Examples: door knob, wagon wheel, car tires |
| Screw | Simple machine made up of an inclined plane wrapped around a column *Examples: bottle cap, screw |
| Pulley | Simple machine made up of a rope fitted around the rim of a fixed wheel, helps lift objects with less force *Ex: flag pole rope |
| Gear | A tooth wheel that interacts with another tooth wheel to transmit motion |
| Force | A push or pull that changes the motion of an object. Speed, friction and gravity are all forces. |
| Motion | Movement or change in the position of an object compared to the objects around it |
| Position | An object's location, or place |
| Energy | The ability to do work |
| Work | Using energy to make something happen |
| Speed | the measure of the distance an object travels in a certain amount of time |
| Friction | Occurs when two objects are rubbed together *can slow or stop motion between two surfaces that are touching *there is more between rough surfaces than smooth surfaces |
| Gravity | Force that pulls objects toward each other, comes from center of our earth, effects of gravity examples: a river flowing down a mountain, an apple falling to the ground after being released (let go), the moon orbiting the earth |
| Reduce | to make less *simple machines reduce the amount of work needed to complete a job |
| Momentum | Force or speed of movement |
| Velocity | A measure of speed in a certain direction |
| Inertia | The tendency of objects to keep moving in a straight line at constant velocity |
Created by:
jenw365
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