Term
| Is impulse a vector quantity or a scalar quantity? |
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Definition
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Term
| In what direction does the impulse vector point? |
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Definition
| the same direction as the average force |
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Term
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Definition
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Term
| Is linear momentum a vector quantity or a scalar quantity? |
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Definition
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Term
| In what direction does the linear momentum vector point? |
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Definition
| the same direction as the velocity |
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Term
| SI unit of linear momentum |
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Definition
| (kilogram x meter)/second ((kg x m)/s) |
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Term
| Impulse is the change in _____ |
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Definition
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Term
| What are the two types of forces that act on a system? |
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Definition
1. internal forces: forces that the objects within the system exert on each other
2. external forces: forces exerted on the objects by agents external to the system |
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Term
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Definition
| a system for which the sum of the external forces in zero |
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Term
| principle of conservation of linear momentum |
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Definition
| the total linear momentum of an isolated system remains constant |
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Term
| Can the total linear momentum be conserved even when the kinetic energies of the individual parts of a system change? |
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Definition
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Term
| Why can the total linear momentum be conserved even when the kinetic energies of the individual parts of a system change? |
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Definition
| internal forces cannot change the total linear momentum of a system |
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Term
| What are the two main ways in which kinetic energy is lost? |
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Definition
1. it can be converted into heat because of friction
2. it is spent creating permanent distortion or damage (ex. in an automobile collision) |
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Term
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Definition
| one in which the total kinetic energy of the system after the collision is equal to the total kinetic energy before the collision |
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Term
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Definition
| one in which the total kinetic energy of the system is not the same before & after the collision; if the objects stick together after colliding, the collision is said to be completely inelastic |
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