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23 Cards in this Set
- Front
- Back
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What is Mechanical Advantage?
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How helpful a machine is. This tells you how many times the machine multiplies the effort force
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What are the 6 simple machines?
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1)Inclined Plane
2)Wedge 3)Screw 4)Wheel and Axle 5)Pulley 6)Lever |
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What is a compound machine?
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Any combination of 2 or more simple machines
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Formula for Work
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Work = Force x Distance
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Formula for Power
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Power = Work/Time
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Formula for Mechanical Advantage
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MA = FR/FE
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In the labs for this unit, you used an instrument to measure force. What was it called?
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Spring Scale
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What is the unit for Work?
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Joule (J)
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What is the unit for Force?
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Newton (N)
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What is the unit for Power
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Watt (W)
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What 2 simple machines make up a wheelbarrow?
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1)Wheel & Axle
2)2nd Class Lever |
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What are 2 simple machines that make up a bicycle
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1)Wheel and Axle
2)1st Class Levers(pedals) 3)Pulleys (Gears) |
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What 2 simple machines make up a shovel?
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1)Wedge
2)3rd Class Lever |
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What is an example of a 1st Class Lever?
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Scissors, SeeSaw, some Catapults, Crowbar, etc.
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What is an example of a 2nd Class Lever?
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Wheelbarrow, Stapler, etc.
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What is an example of a 3rd Class Lever?
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Fishing Pole, Shovel, Broom, Rake, Pitch Fork, Hockey Stick, etc.
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This simple machine is an inclined plane wrapped around an axis to make a spiral.
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Screw
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This simple machine is an inclined plane that moves. It is usually sharp and is used to cut into things.
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Wedge
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This simple machine is a flat slanted surface that makes it easier to raise heavy loads.
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Inclined Plane
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This simple machine is made up of 2 circular objects of different sizes
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Wheel and Axle
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True or False: In a pulley system, the MA increases as you add more pulleys
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True
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This simple machine is a rope, belt, or chain wrapped around a grooved wheel
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Pulley
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This is the force that all machines work to overcome. (This force usually slows an object down.)
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Friction
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