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17 Cards in this Set
- Front
- Back
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What is tangential speed? |
The linear speed of something moving along a circular path. |
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What is rotational speed? |
The number of rotations or revolutions per unit |
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Formula for tangential speed |
v is proportional to (radius)(rotational speed) |
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what occurs when tangential speed undergoes change? |
Tangential acceleration |
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What is rotational inertia? |
The property of an object to resist changes in its rotational state of motion. |
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Rotational inertia of a hoop? |
I=(mass)(radius squared) |
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Stick about end |
I=1/3(m)(Length squared) |
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Stick about center of gravity |
I=1/2(mass)(Length squared) |
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Solid cylinder/Disc |
I=1/12(mass)(radius squared) |
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Sphere |
I=2/5(mass)(radius squared) |
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Formula for torque? |
Torque = lever arm x force |
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What is centripetal force? |
Any force directed toward a fixed center |
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What is the formula for centripetal force? |
F = (mass)(tangential velocity) / (radius squared) |
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What is centrifugal force? |
During a rotating or revolving system, the apparent outward force. |
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What is angular momentum? |
The momentum of rotating objects. The product of rotational inertia and rotational velocity. |
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What is the formula of angular momentum? |
Angular momentum=mvr |
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What does the law of conservation of momentum state? |
If no external net torque acts on a rotating system, the angular momentum of tat system remains constant. |
