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12 Cards in this Set
- Front
- Back
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IMPULSE
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THE PRODUCT OF THE FORCE ACTING ON AN OBJECT & THE TIME DURING WHICH IT ACTS
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THE STORED ENERGY THAT A BODY POSSESSES B/C OF ITS POSITION
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POTENTIAL ENERGY
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EFFICIENCY
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THE PERCENT OF THE WORK PUT INTO A MACHINE THAT IS CONVERTED ONTO USEFUL WORK OUTPUT (USEFUL ENERGY OUTPUT DIVIDED BY TOTAL ENERGY OUTPUT)
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ENERGY
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THE PROPERTY OF A SYSTEM THAT ENABLES IT TO DO WORK
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POWER
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THE TIME RATE OF WORK
WORK/TIME |
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WORK
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THE PRODUCT OF THE FORCE & THE DISTANCE THROUGH WHICH THE FORCE MOVES
FORCE X DISTANCE |
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CONSERVATION OF ENERGY
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IN THE ABSENCE OF EXTERNAL WORK INPUT OR OUTPUT, THE ENERGY OF A SYSTEM REMAINS UNCHANGED. ENERGY CANNOT BE CREATED NOR DESTROYED.
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CONSERVATION OF ENERGY & MACHINES
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THE WORK OUTPUT OF ANY MACHINE CANNOT EXCEED THE WORK INPUT. IN AN IDEAL MACHINE, WHERE NO ENERGY IS TRANSFORMED INTO HEAT:
work input=work output and (Fd)input= (Fd)output |
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KINETIC ENERGY
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ENERGY OF MOTION, DESCRIBED BY THE RELATIONSHIP
mass x velocity (squared)/ 2 |
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RELATIONSHIP OF IMPULSE & MOMENTUM
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IMPULSE IS EQUAL TO THE CHANGE IN THE MOMENTUM OF THE OBJECT THAT IMPULSE ACTS ON.
Ft= change in mass x velocity |
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MOMENTUM
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THE PRODUCT OF THE MASS OF AN OBJECT AND ITS VELOCITY
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MACHINE
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A DEVICE, SUCH AS A LEVER OR PULLEY, THAT INCREASES (OR DECREASES) A FORCE OR SIMPLY CHANGES THE DIRECTION OF A FORCE
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