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16 Cards in this Set
- Front
- Back
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What is the ideal mechanical advantage that would happen without friction?
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100%
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What is the SI unit of work?
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Joule
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In the arm, what acts as a fulcrum?
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Elbow
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What two things need to be present for work to ocur?
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Force and Distance
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What is a mechanical advantage?
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The number of times a machine increases in force exerted on it
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What to tendons attach?
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Bones and musles
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Does a machine decrease the amount of work you do?
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No!
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What simple machine is an inclined plane wrapped around a cylinder?
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Screw
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what is a pulley?
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A rope wraped around a wheel
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What does a flagpole do with the input force?
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It changes the direction of force
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What is a fulcrum?
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A fixed point in which a lever pivots
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What are a few examples of a wheel and axle?
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Screwdriver, Car, Stearing Wheel
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What is the formula to find Ideal mechanical advantage of a wheel and axle?
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Radius of wheel/ Radius of axle
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What are a fex examples of a wedge?
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Ax, Cutting edge of knife, Zipper, inscisors
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A machine can make work easier by doing what?
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Changing direction of force, changing distance, changing force
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You input 1600 joules onto a hammer, and the output is 800 joules, what is the efficency?
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50%
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