Physics Vocabulary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Kinematics | The area of physics that deals with the mathematical methods of describing motion without regard to the forces which produce it.
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| Kilogram (kg) | The SI unit of mass equal to 1,000 grams.
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| Circumference | The perimeter or "distance" around a circle. Mathematically determined as the product of π and the diameter, or the product of π and twice the radius: C = πd = 2πr.
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| Average Speed | The average of the initial and final speeds of an object: image
Speed is the magnitude of the velocity vector.
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| Kinetic Energy | The energy that an object possesses because of its motion.
The kinetic energy of an object is directly proportional to its mass and also to the square of its velocity: .
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| Displacement | A vector quantity that represents the length and direction of a straight line path from one point to another.
The magnitude of displacement is distance.
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| Velocity | A vector quantity which represents the time-rate of change in the displacement of an object: .
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| Slope Of A Graph | The ratio of the change in the vertical coordinate to the change in the horizontal coordinate.
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| Speed | A scalar quantity that represents the magnitude of velocity. It is the time-rate of change in distance: .
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| Magnitude | The size of a vector quantity, ignoring its direction.
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| Constant Velocity | Uniform unchanging velocity.
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| Second (s) | The SI unit of time. It is a fundamental unit.
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| Final Speed | The speed (magnitude of velocity) that an object ends with
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| Order Of Magnitude | A rough measure of size relationships, usually expressed as powers of 10.
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| Distance | A scalar quantity that represents the length of a path from one point to another; the magnitude of the displacement vector.
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| Acceleration | A vector quantity that represents the time-rate of change in the velocity of an object: .
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| Mass | The resistance that an object offers to a force acting upon it; the ratio of the net force acting on the object to its acceleration: m = F/a.
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| Meter (m) | The SI unit of length. It is a fundamental unit.
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| Derived Unit | A unit of measurement that can be expressed in terms of the fundamental international standard (SI) units.
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| Diameter | A chord that passes through the center of a circle; the length of a straight line segment that begins on a circle, passes through the center, and ends on the circle.
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| Average Velocity | The average velocity of uniformly accelerated object may be found by averaging its initial and final velocities.
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