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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is work? How do you find Work? What are the Units?
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force extented through a distance. Work= force x distance. Units: J (Joules)
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f o r c e
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What is a machine?
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Device used to make work easier by changing amount, speed, or direction of the force.
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sewing machine compared to sewing by hand.
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What is input and output?
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input= effort (your force)
output= resistance (machines force) |
you---><---machine
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What is a Mechanical Advantage?
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how many times the machine makes work easier.
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Simple Machine Math Worksheet.
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What is Efficiency?
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the input and output time 100
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you---><---machine x#
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What is a Simple Machine?
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produces work in one movement.
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1
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Name all 3 inlclines.
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1. Inclined Plane
2. Wedge 3. Screw |
look in worksheets
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What is an inclined plane?
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flat, slanted, surface. Changes amount and distance of force.
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^ look at the arrow. look at the part going up.
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What is a wedge?
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3-D inclined plane with sharp narrow end. Changes amount and direction.
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^ pretend that arrow is a wedge.
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What is a screw?
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circular incline with threads. Changes amount, distance, and direction of force.
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Think of a screw that you would screw drive in a peice of wood.
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What simple machines are in the lever group?
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1. Lever
2. Wheel and Axle 3. Pulley |
notes
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What do all the simple machines in the lever group have in common?
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They all have a:
1. Fullcrum 2. ressistance 3. effort |
notes
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What is the first class of the lever group?
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FIRST CLASS: fulcrum in between effort and resistance
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E_____________________R ^ |
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What is the second class of the lever group?
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SECOND CLASS: resistance in between
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___E________R___________ ^ ___________r_________e__ ^ |
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What is the third class of the lever group?
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THIRD CLASS: Effor in between. Changes amount and distance of force.
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notes
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