Home > Flashcards > Physics > Rotational Motion ch.7 & ch.8

Details Title: Rotational Motion ch.7 & ch.8 Description: Equilibrium & Dynamics Total Flash Cards: 20 Created: 12/03/2006 15:18:12	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Angular Displacement Definition the angle through which a rigid object rotates about a fixed axis. Positive rotation = counterclockwise negitive rotation = clockwise Term Radian Definition the SI unit fo angular displacement. It equals to the central angle whose base is equal to a radius of a circle. magnitude of one radian equals 57.3 degrees. Term Angular velocity Definition rate of an angular displacement. ANd angular speed si a magnitude of an angular velocity. Term Tangential distance Definition the length of a circular path traveled by an object during a circular motion Term Tangential velocity Definition tangential component of an instataneous velocity of an object. Term Period of Rotation Definition the time that is necessary for an object to complete one revolution around the moving object Term Revolution Definition one full rotation Term Uniform circular motion Definition hte motion fo an object traveling in a circular path at a constant speed Term centripetal force Definition the net force that keeps and object in a circualr path. This net force is directed toward the center of a circular path. Term Centripetal acceleration Definition the acceleration that an objectmust have to stay in a circular path. ( it is always directed towards the center of the circualr path Term Newton's universal law of gravitation Definition relation between a gravitational force and masses of objects participathing in a gravitational interaction and also between a gravitational force and a distance between these objects. Term Gravitational constant 6.67x10^-11 Definition the coefficient of a proporitionality in the law of gravity. it equals a magnitude of a gravitional force between two like objects fo 1 kg mass each Term orbital motion Definition motion of planets of satellites along a closed path under the action of gravity Term Satellite's orbital speed Definition the tangential speed of a satellite during it's orbital motion Term torque Definition a vector physical quantity thatt characterizes the tendency of force acting on a rigid object to totate this object around a pivot or an axis fo rotation. ( the magnitude of torque equals a product of force times a lever arm Term lever arm Definition the shortest distance between a pivot and a line of action of the force. IT's equal to the length fo a perpenrdicualr dropped form a pivot on the line of action of the force. Term LINE OF THE ACTION Definition a line drawn collinear with a force Term Rotational equilibrum Definition the type of equilibrium of an object having the axis of rotation. When an object is in totaionl equilibrum its net torque equals zero. Term Center fo Gravity Definition the imaginary point associated with an object where the gravitational force si considered to act Term Center of mass Definition imaginaty point associtaed with an object where it's mass can be considererd to be concentrated