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10 Cards in this Set
- Front
- Back
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Acceleration |
How much an objects velocity changes each second. When an object moves faster, its acceleration and velocity are in the same direction, and when an object slows down, the velocity an acceleration are in opposite directions. An object can experience acceleration moving at a constant speed. This happens when an object turns, as in circular motion. |
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Amplitude |
The distance from the midpoint of a wave yo either the crest or the trough. For an oscillating system, the amplitude of the motion is the distance between the maximum displacement and the equilibrium position. |
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Angular Momentum |
An object's rotational inertia times rotational velocity. For an object rotating a distance about a central axis of rotation, the change in an object's angular momentum is the product of its torque over a given time interval. Units are kgm^2/s |
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Antinodes |
Positions on a standing wave with the maximum amplitude |
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Beats |
Interference that happens when two notes of unequal but close frequencies are played simultaneously. The beat frequency is the difference between the two frequencies. |
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Center of Mass |
A unique point in an object or a system where one can consider all of the mass as being concentrated. The center of mass can be used to analyze what will happen to the object or system under the influence of forces or torques. |
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Centripetal Acceleration |
A "center-seeking" acceleration. An object moving in a circle experiences centripetal acceleration directed radially inward. The centripetal acceleration acts perpendicularly to the tangential velocity of the object and causes a change in direction rather than an increase in the object's speed. |
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Charge |
A fundamental property of matter that is affected by an electric field. It is measured by an excess or deficit of electrons on an object. Charge (Q) can be positive or negative and is measured in coulombs (C). |
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Coefficient of Friction |
A unitless quantity that tells us how 'sticky' two surfaces are when rubbed past one another. This is a material-dependent quantity, and every pair of objects will have a unique coefficient of friction; the coefficient of static friction is larger than that of kinetic friction. The coefficient is equal to the ratio of the frictional force to the normal force and is always less than one. |
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Coulomb's Law |
Describes the force of attraction or repulsion between two electric charges. The electrostatic force is proportional to the magnitude of the produce of the two charges and inversely proportional to the distance between them squared. The electric force is measured in Newtons (N) and is a vector quantity that has magnitude and direction. The direction of the electric force depends on the sign of the charges involved. |
