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14 Cards in this Set
- Front
- Back
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Axis |
The line around an object rotates or revolves |
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Linear Speed |
Distance per unit of time Usually called speed |
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Tangential speed |
Speed of an object in a circular arc radial distance*rotational speed |
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Rotational Speed (Angular Speed) |
Number of rotations per unit of time Constant on a circular object |
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Rotational Inertia |
Object rotating about its axis tends to keep rotating about the axis Newton's 1st law in rotating form Rotating keeps rotating nonrotating keeps nonrotating Rotating objects tend to keep their axis of rotation pointing in one direction |
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Torque |
Force*lever arm (distance) Rotational Force Twist or spin Unit is Newton meter |
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Center of gravity |
point at which all an object's weight is evenly distributed Objects rotate around their CG |
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Center of Mass |
Point at the center of an object's mass |
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Equilibrium |
A state of balance No net force acts on an object |
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Unstable Equilibrium |
State of balance small displacement or rotation will lower Center of gravity |
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Neutral Equilibrium |
State of balance Small movements will neither raise nor lower center of gravity |
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Stable Equilibrium |
State of balance Small displacement will neither raise nor lower center of gravity Hard to knock over |
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Centripetal force |
center seeking Any force that acts towards the center |
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Centrifugal force |
fictitious force Outward force |
