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Simple Machines
| Question | Answer |
|---|---|
| What are the six types of simple machines? | Simple lever, pulley, wheel and axle, simple inclined plane, wedge, screw |
| What are the two major categories (families)? | Lever family and Inclined Plane family |
| What is in the lever family? | Simple lever, pulley, and wheel and axle |
| What is in the inclined plane family? | Simple inclined plane, wedge, and screw |
| What is a lever made up of? | A rigid arm that turns around a fulcrum |
| With a lever, the input force is ___ or redirected into an ____ ____ | multiplied; output force |
| What are the three classes of levers? | First, second, and third |
| What is a first class lever? | A lever that has a fulcrum between the points of application of the input and output forces |
| What is the ma if the fulcrum is closer to the input force? (First class lever) | More than 1 |
| A ___ for a larger distance (first class lever) | lot of force |
| What is the ma if the fulcrum is closer to the output force? (First class lever) | Less than 1 |
| What is a second class lever? | A lever that has a fulcrum that's at one end of the arm and the input force is applied to the other end |
| Always ____ the force (second class lever) | multiplies |
| What is the ma? (second class lever) | Less than 1 |
| What does a third class lever do? | Multiplies distance rather than force |
| What is the ma? (third class lever) | More than 1 |
| Takes a larger ___ to get a lot of ___ | force; distance |
| A first class lever can either multiply ___ or increase ___ | force; distance |
| A second class lever will always multiply ___ | Force |
| A third class lever will always increase ___ | Distance |
| What are pulleys? | Modified levers |
| What is the ma of a fixed pulley? | 1 |
| What does a pulley do to the force? | Changes the direction |
| What can multiple or moving pulleys do to the ma? | Increase it |
| What is a wheel and axle? | A lever connected to a shaft |
| What happens when a small input force is applied to the steering wheel? (wheel and axle) | The force is multiplied to become a large output force applied to the steering column |
| What is a ramp? | An example of an inclined plane |
| When you push an object up an inclined plane, what does it require? | Less input force than lifting the object |
| What is the ma equal to with an inclined plane? | Length/height the object is lifted |
| What is a wedge? | A modified inclined plane |
| What is a wedge formed from? | Two inclined planes placed back to back |
| What does a wedge turn a single downward force into? | Two forces directed out to the sides |
| What is a screw? | An inclined plane wrapped around a cylinder |
| What does a screw with steeper sides require? | More force over less distance |
| What is a compound machine? | A machine that combines two or more simple machines |
Created by:
archergirl
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