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AP Physics 1

Vocabulary Chapter 5

QuestionAnswer
Centripetal Force The force that causes centripetal. It is a vector quantity directed toward the center of the path of an object undergoing uniform circular motion The centripetal force is the net force acting on the object which maintains its constant speed.
Circular Velocity The velocity of an object traveling with circular motion.The direction of this motion is always changing.
Centripetal Acceleration The acceleration experienced by an object traveling in uniform circular motion. An object undergoing uniform circular motion experiences a centripetal acceleration directed toward the center of its curved path. Ac=v^2/r
Newton's Universal Law of Gravitation Any two points masses attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distances between them. Fg= Gm1m2/r^2
Satellite A smaller body which revolves or orbits around a larger one. Satellites of the sun include planets. The motion of satellites is governed by Kepler's Laws. If the speed of a satellite exceeds escape velocity it will leave earths orbit
Kepler's First Law The path of each planet about the sun is an ellipse with the sun at the focus
Centripetal Velocity The velocity of an object traveling in a circular path directed at tangent to the circle
Kepler's Second Law Each planet moves so that an imaginary line drawn from the sun to the planet sweeps out equal areas in equal periods of time. As planets move closer to the sun potential energy decreases and their kinetic energy increases resulting in a change in speed.
Kepler's Third Law The ratio of the cube of the mean radius of a planets orbit to the square of its orbital is the same for all planets. R^3/T^2=k .
Uniform Circular Motion The motion of an object at constant speed around a circular path.
Created by: BMcCormack
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