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Science
Question | Answer |
---|---|
Work equation: Definition: Unit: | Force applied over distance W=FxD JOULES |
Power equation: Definition: Unit; | Rate of work P=w over time Watts |
Efficiency equation: Definition: | Output over input times 100 How well the machine works |
Mechanical advantage equation: Definition: | MA=OUTPUT OVER INPUT How well the machine works. |
Types of machines | Inclined plane- sloping surface used to raise objects Examples: ramp, hill, stairs |
Types of machines | Ledge- two sloping slides Examples: scissor, ax, zipper |
Types of machines | Lever- a bar that is free to pivot about a fixed point Examples: see-saw, bat, nut cracker |
Types of machines | Pulley- grooved wheel with a rope Examples: flag pole, blinds |
types of machines | wheel and axle- two wheels of different sizes that rotate together examples: wheel, doorknob |
work input | the work you put into the machine |
work output | the work the machine does for you |
lose energy as | heat |
machine | makes work easier for you by multiplying the force |
what is the unit of distance | meters |
what is the unit of force | newtons |
what is the unit of work | joules |
what is the unit of weight | newtons |
what is the unit of power | watts |