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14 Cards in this Set
- Front
- Back
Conservation laws
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The total mass in an isolated system is constant.
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Linear momentum
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The mass of an object times its velocity. Linear momentum is a vector.
linear momentum = mv |
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Energy
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measure of a system's capacity to do work. (E)
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angular momentum
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spinning
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Law of conservation of linear momentum
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The total iinear momentum of an isolated system is constant.
total mv before = total mv after |
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Work
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Force x distance
10 lbs x 10' = 100 ft-lbs |
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kinetic energy
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1/2 mv2
energy due to motion. Energy that an object has because it is moving. |
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potential energy
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Energy due to an oject's position or orientation.
mgh |
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Law of conservation of energy
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Energy cannot be created or destroyed, only converted from one form to another.
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Power
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rate of doeing work. rate at which energy is transferred or transformed.
work divided by time |
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What is a conservation law? What is the basic approach taken when using a conservation law?
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no matter enters or leaves the system.
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Why is the alternate form of Newton's second law of motion given in this chapter the more general form?
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because of a small force for a long time or a big force for a short time.
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For what type of interaction between bodies is the law of conservation of linear momentum most useful?
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momentum of an object can change only because of interaction with other objects in the system.
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Identify as many diferent forms of energy as you can that are around you at this moment.
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lights heat graitational stored
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