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Science Vocab.
SIcience Vocabulary for Work and SImple Machines
| Term | Definition |
|---|---|
| Force | A push or a pull |
| Work | Done when an applied force cause an object to move in the direction of the force |
| Simple Machine | A device that makes work easier with only one movement |
| Compound Machine | A combination of simple machines |
| Mechanical Advantage | The number of times a machine multiplies the effort of force you apply to it |
| Pulley | An object with a groove, like a wheel, with a rope or chain running through the groove |
| Lever | A rod or plank that pivots around a fixed point |
| Wheel and Axle | It is made of two round objects that are attached and rotate together about the same axis |
| Inclined Plane | A sloped surface that does not move |
| Wedge | An inclined plane that tapers to a sharp edge. |
| Fulcrum | A fixed point |
| Work= | Distance x Force |
| Machines can | Make work easier by changing the amount of force, changing the distance, and by changing the direction. |
| 1st class lever examples | Seesaw, Crowbar, Scissors, and Pry bar |
| 2nd class lever examples | Wheelbarrow, Bottle Opener, and Nutcrackers |
| 3rd class lever examples | Broom, Shovel, arm, leg, and fishing rod |
| A pulley _________ force. | Changes the direction |
| Instead of _______ against the load | Lifting up, you can pull down using your body weight |
| Compound Pulley | A system of movable pulleys |
| Mechanical Advantage can increase _________ pulley. | By using more than one |
| Inclined plane provides____. | Not less work but less effort. |
| Inclined plane are used to__. | Reduce the force needed to overcome the force of gravity when lifting and lowering a heavy object. |
| A screw has _ parts. | 2 |
| What are the names of the parts of a screw and which part is it? | The Body: Cylinder Post The Thread: Inclined plane wrapped around the cylinder |
| Functions of a screw | Fasten things (standard screw or nuts and bolts), Make holes (drill bits), and lift heavy objects (jackscrew). |
| Archimedes screw | Screw that contains a cylinder used to move water |
| A wedge is used ___. | To increase force |
| The _____ wedge moves through it. | Material remains in place. |
| Wedges can be ____. | Forced between two things to hold them tightly together (doorstop or a nail) or used to cut, split and fasten (teeth, knives, and axes). |
| On a wheel and axle the ____. | Wheel is connected to a rigid pole |
| How is a wheel and axle a modified lever? | The center of the axle acts as a fulcrum making the wheel a lever that rotates around in a circle. |
| Is the bigger one usually the wheel or the axle? The wheel | The wheel |
Created by:
NerdyAngel
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