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| What are two characteristics of friction? |
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Definition
- Parallel to the contact surface
- Opposite to relative motion - direction that prevents surfaces from sliding past each other
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Term
| What is the difference between static and dynamic equilibrium? |
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Definition
- Static equilibrium-velocities constant and equal to zero
- Dynamic equilibrium-velocities constant and not equal to zero
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Definition
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Definition
- vf=vo + at
- vf=xo + vot + .5(at2)
- vf2=vo2 + 2aΔx
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Definition
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Definition
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| Total energy transfer due to forces excluding heat |
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Definition
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Definition
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Term
| How do ideal machines alter force and work? |
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Definition
| Reduce force but don't change work |
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Term
| How do ramps manipulate force and work? |
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Definition
| Constant work: +d (ramp length) so -F |
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Term
How do levers manipulate force and work?
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Definition
| Constant torque: +l (lever arm) so -F |
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Term
| How do pulleys manipulate force and work? |
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Definition
| Constant work: +d (rope) so -F |
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Term
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Definition
| Difference between nuclear mass and summed mass of individual particles (binding energy) |
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Term
| What is the difference between elastic and inelastic collisions? |
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Definition
| Kinetic energy is conserved in elastic collisions but not inelastic ones. |
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