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23 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Linear distance |
Distance along the circumference of a circle, or of any curve |
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Angular velocity |
Rate of change of angular position of a rotating body |
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Angular acceleration |
Rate of change of angular velocity |
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Rotation |
Refers to the motion of a body turning about an axis, where each particle of the body moves along a circular path |
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Moment of interita |
Rotational intertia or 2nd moment of area |
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Radius gyration |
Distance from axis of rotation to center of mass |
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Torque |
Moment of force; measure of force needed to rotate an object about an axis |
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Moment arm |
Shortest distance from axis to the line of force |
Nm Clockwise - |
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Centripetal force |
A force directed towards the center around which the body is moving |
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Uniform circular motion |
Motion of an object traveling along a circular path at constant speed but changing velocity |
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Center of gravity |
Point where its entire wieight is concentrated |
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Particle |
forces are concurrent so there is no rotation |
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Rigid body |
Extended body in space that does not deform |
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Rigid body |
Forces may not pass through a common point so there may be rotation |
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Law of ellipse |
The orbit of a planet around the sun is an ellipse with the sun at one focus |
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Law of equal areas |
The planet moves around the sun in such a way that a line drawn from the sun to the planet sweeps out equal areas in equal intervals of time |
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Perihelion |
Shortesr distance from the sun |
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Aphelion |
Farthest distance from the sun |
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Gravitation |
A force that brings 2 bodies toward one another |
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Satellite |
Any object that orbits a planet or a star |
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Centripetal force |
Provided by gravitation between the satellite and planet/star |
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Syncom |
Synchronous communication satellites having the same period of revolution to the period of rotation of the planet it orbits |
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Escape speed |
Minimum speed an object must have in order to escape the gravitational field of a planet withiut falling back |
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