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Wise Simple Machines
chapter 19 (red book)
| Question | Answer |
|---|---|
| Rate of motion calculated by dividing the distance traveled by the amount of time it takes to travel that distance. | Average speed |
| A push or a pull; SI unit is the Newton. | Force |
| A combination of simple machines. | Compound machine |
| An object with a groove, like a wheel, with a rope or chain running through the groove. | Pulley |
| A rod or plank that pivots about a fixed point. | Lever |
| The speed of an object at any given time. | Instantaneous speed |
| A set of rules developed by Isaac Newton to explain how forces change the motion of an object. | Newton's Laws of Motion |
| The tendency to resist a change in motion. | Inertia |
| A change in velocity divided by the amount of time needed for the change to occur; takes place when an object speeds up,slows down, or changes direction. | Acceleration |
| The number of times a machine multiplies the effort force you apply to it. | Mechanical advantage |
| This is done when an applied force causes an object to move in the direction of the force. | Work |
| Force that resists motion between two touching surfaces and always acts opposite to the direction of motion. | Friction |
| Speed of an object and its direction of motion; changes when speed changes, direction of motion changes, or both change. | Velocity |
| The measure of the amount of matter an object has. | Mass |
| A sloped surface (simple machine). | Inclined plane |
| A device that makes work easier with only one movement; can change the size or direction of a force. | Simple machine |
Created by:
bwise
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