# Shared Flashcard Set

## Details

chapter 6.2, 7, 8 and 14 vocab
uhggg
28
Physics
02/18/2008

Term
 Gravitational Field
Definition
 object with mass is surrounded by this. Another object experiences a force due to the interaction between its mass and the gravitational force
Term
 inertial mass
Definition
 the mass related to inertia of an object
Term
 gravitational mass
Definition
 mass determines the amount of gravitational force between two objects
Term
 uniform circular motion
Definition
 movement of an object or particle trajectory at a constant speed around a circle with a fixed radius
Term
 centrepital acceleration
Definition
 an object's acceleration wich always points towards the center and is in uniform circular motion
Term
 centripetal force
Definition
 the net force toward the center of the circle of an object moving in a circle
Term
 kepler's first law
Definition
 the paths of the planets are ellipse with the sun at one focus
Term
 Kepler's 2nd law
Definition
 an imaginary line from the sun to a planet sweeps out in equal areas in equal tine intervals
Term
 Kepler's 3rd law
Definition
 the square ratio of the periods of any two planets revolving about the sun is equal to the cube of the ratio of their average distances from the sun
Term
 gravitational force
Definition
 the force of attraction between two objects must be proportional to the objects weight
Term
 law of universal gravitation
Definition
 objects attract other objects with a force that is proportional to the product of their masses and inversely to the square of distance between them
Term
 angular displacement
Definition
 change in angle as object rotates
Term
 angular velocity
Definition
 angular displacement divided by time taken to make displacement
Term
 angular acceleration
Definition
 change in angular velocity divided by the time taken to make the change
Term
 torque
Definition
 measure of how effectively a force causes rotation
Term
 moment of inertia
Definition
 resistance to rotation
Term
 Newton's 2nd law for roatational motion
Definition
 angular acceleration is directly proportional to net torque and inversely to moment of inertia
Term
 center of mass
Definition
 the point on an object that moves in the same way that a point particle would move
Term
 centrifugal "force"
Definition
 not a real force. The apparent outward force
Term
 coriolis "force"
Definition
 not real. We observe a deflection in horizantal motion when we are rotating in a frame refrence
Term
 periodic motion
Definition
 motions that repeat in regular cycles
Term
 simple harmonic motion
Definition
 motion that resultsif force that restores objects equilibrium is directly proprtional to the displactement of the object
Term
 period
Definition
 time needed for object to repeat one comlpex cycle of motion
Term
 amplitude
Definition
 maximum distance that object moves from equilibrium
Term
 Hooke's Law
Definition
 force exerted by a spring is directly proportional to the amount that the spring is stretched
Term
 pendulum
Definition
 consists of a massive object ( bob ) suspended by a string
Term
 resonance
Definition
 occurs when small forces are applied at regular intervals to a vibrating object. Aplitude increases
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