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14 Cards in this Set
- Front
- Back
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What are the six simple machines
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Lever, pulley, wheel and axle, simple inclined plane, wedge, and screw
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Why are wedges and screw part of the inclined plane family of simple machines
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Because an incline plane is used for lifting or splitting, the purpose of screws and wedges
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How are second-class levers and third-class levers similar? How are they different?
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The placement of the falcrum and the direction of the input and output forces
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How are fixed pulleys similar to first-class levers?
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THe pulley has the fulcrum in the same spot and the in/outpu forces are in the same direction
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How does a fixed pulley change the input force?
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It changes the direction of the applied force
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What is the equation for power?
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P= work divided by time
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What is the unit for power?
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Newtons
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What is the equation for force?
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P= work divided by time
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What is the relationship between work and power?
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Power is the measurement of work
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How do machines make work easier?
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Machines make work easier by changing the size of the input force, the direction of the force or both
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What are two principle parts of levers?
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all levers have a rigid arm and a falcrum
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How does using an incline plane change the force required to work?
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pushing an object up on an inclined plane requires less input force
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What is the equation for mechanical advantage?
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M= output force divided by output force
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What is the equation for work?
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W=fd
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