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15 Cards in this Set
- Front
- Back
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Force
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Newtons (N)
Load Effort |
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Mechanical Advantage: Meaning
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M.A. greater than 1.0 = easier
M.A. less than 1.0 = harder --> resistance training --> speed advantage --> distance advantage |
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Mechanical Advantage: Calculations
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Forces: M.A. = Load Force/Effort Force
Distance: M.A. = Effort Arm/Load Arm |
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Friction
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resistance to moving
STOPPING!!! |
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Energy
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Joules (J)
ability to do work |
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Work
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W = Force in N x Distance in m
measured in Joules Criteria: apply force & move a distance |
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Efficiency
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%
wanted work/work put in x 100% |
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Systems
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linkages - eg. chain
transmission - step |
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Systems: Evaluate
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1. Effiency
2. Design 3. Functions 4. Environment 5. Convenience 6. Cost 7. Aesthetics |
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Simple Machines
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device that simplifies a task
reduces effort |
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Simple Machines: Wedge, Screw, Wheel + Axle
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1. Wedge
2. Screw - twisted inclined plane 3. Wheel + Axle |
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Simple Machines: Pulley
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Movable - M.A. = count # of strings holding up the mass
Fixed - M.A. = changes direction, not really a simple machine |
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Levers: Terminology
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load, effort, fulcrum, load & effort arm (from fulcrum to point)
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Levers: Classes
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Class 1 - fulcrum in the middle; distance advantage
Class 2 - load in the middle; strength advantage Class 3 - effort in the middle; speed advantage |
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Levers: Calculations
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M.A. = Load Force/Effort Force
M.A. = Effort Arm/Load Arm |
