Understanding Physics: Key Concepts and Definitions
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Henry Cavendish
conducted an experiment that determined the value of the constant...
Rev of Heavenly Spheres
written by Copernicus in which he proposed that earth and the other planets orbit the sun in perfect circles
Axis of Rotation
the line about which the rotation occurs
Tycho Brahe
made precise observation of the planets and stars
Gravitational Force
the mutual force of attraction between particles of matter
Centripetal Force
the net force of an object in uniform circular motion
Uniform Circular Motion
an object that revolves about a single axis and has a constant tangential speed
Inertial Mass
the property of an object to resist acceleration
Centrifugal Force
an apparent force that "pushes" away from center
Apparent Weightlessness
this phenomenon occurs when there is no force of support on your body
Tangential Speed
the speed of an object in circular motion
Centripetal Acceleration
the acceleration directed toward the center of a circular path
Weight
a quantity defined as the product of the mass
Lever Arm
the perpendicular distance from the axis of rotation to a line drawn along the direction of the force
Kepler
three laws of planetary motion
Torque
a quantity that measures the ability of a force to rotate an object around some axis