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