Term
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Definition
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Term
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Definition
| device that does work with only one movement. |
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Term
| machines make work easier by.... |
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Definition
1.) multiply the force (mechanical adv)
2.) multiply the distance (speed adv.)
3.) changing the direction of the force |
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Term
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Definition
| force applied to the machine by you |
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Term
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Definition
| force applied by the machine |
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Term
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Definition
Fe * De
(effort force * effort distance) |
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Term
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Definition
Fr * Dr
(resistance force * distance force) |
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Term
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Definition
Actual Mechanical Adv.
Fr/Fe |
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Term
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Definition
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Term
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Definition
| bar that's free to pivot or turn about a fixed point |
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Term
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Definition
| fulcrum in between resistance and effort forces. ALWAYS changes directions. EXAMPLE: see-saw |
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Term
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Definition
| resistance between fulcrum and effort forces. ALWAYS has a mech. adv. EXAMPLE: wheelbarrow |
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Term
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Definition
| effort between fulcrum and resis. forces. ALWAYS provides a speed adv. EXAMPLE: baseball bat, canapolt |
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Term
| all types of simple machines |
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Definition
PIVOT: lever, wheel and axle, pulley
RAMP: inclinded plane, screw, wedge |
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Term
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Definition
Le/Lr
(lever effort/lever resis.?) |
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Term
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Definition
| count number of strings supporting the weight |
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Term
FIXED PULLEY
MOVEABLE PULLEY
BLOCK/TACKLE |
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Definition
only changes direction of the force
provides mechanical adv.
combination of fixed/movable pulleys |
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Term
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Definition
rw/ra
(radius wheel,aka the bigger one/radius) |
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Term
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Definition
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Term
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Definition
Wo/Wi *100%
(work output/work input *100%)
OR
AMA/IMA * 100% |
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Term
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Definition
| a combination of two or more simple machines |
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