# Shared Flashcard Set

## Details

Mr. Jones Physics Exam
the study of physical stuff
60
Physics
Not Applicable
05/21/2005

Term
 Conductor--
Definition
 something electrons can pss through easily
Term
 In which direction do electrons flow in a battery?
Definition
 towards the positive end
Term
 As the electrons pass by the light bulb, what happens?
Definition
 they change the gas to plasma and it glows
Term
 What happens when you recharge a battery?
Definition
 you reverse the flow of electrons
Term
 What is needed to make a battery?
Definition
 zinc, copper, copper sulfate, circuit
Term
 Weight--
Definition
 the force at which gravity pulls an object downmass * gravity~acceleration due to gravity = 9.8 m/s^2~mass * 9.8--units: N or lbs--
Term
 Mass--
Definition
 how much matter is in an object--units: kg--
Term
 Force--
Definition
 a push or pull on an object--units: N--
Term
 Gravity--
Definition
 the force that pulls an object to the core of its planetthe universal pull/attraction of any object to any other object
Term
 What 2 things does gravity depend on?
Definition
 mass and proximity
Term
 Friction--
Definition
 the force that opposes motioin between 2 surfaces that are in contact with each other
Term
 What are the factors that affect friction?
Definition
 speed of the object(s), surface type, force pressing the surfaces together
Term
 Newton's First Law--
Definition
 a body at rest will remain at rest or a body in motion will remain in motion unless acted upon by an outside force~inertia~
Term
 Newton's Second Law--
Definition
 an object will accelerate in the direction of the net force acting on itthe accelration is inversely proportional to the object's mass (the bigger an object is, the less it will accelerate; dori will accelerate more than john)F(net)=mass * acceleration
Term
 Newton's Third Law--
Definition
 for every action there is an equal and opposite reaction
Term
 Balanced forces--
Definition
 forces equal in size and opposite in direction~ex. 2N pulling block, 2N resisting
Term
 Mass is directly proportional to ______
Definition
 inertia
Term
 Inertia--
Definition
 the tendency of an object to resist a change in motion
Term
 Air resistance--
Definition
 the force air exerts on a moving object(sort of like friction in the air)
Term
 Terminal velocity-
Definition
 highest velocity reached by a falling object
Term
 Centripetal acceleration--
Definition
 the acceleration to the center of a curved path
Term
 Centripetal force--
Definition
 the tendency of an object to move to the center~ex. roller coasters, swinging a bucket over your head
Term
 Velocity--
Definition
 the speed at which an object is traveling in a single direction~change in distance over change in time~
Term
 What is the difference between batteries in series and batteries in parallel positions?
Definition
 series --> multiplies voltage*more power*parallel makes it last longer (doesn't multiply)*lasts longer*
Term
 Work--
Definition
 force * distance
Term
 machine--
Definition
 a device that makes work easier*simple machine--a device that does work with only 1 movement*
Term
 effort force/input force--
Definition
 force applied to the machine
Term
 resistance force/output force--
Definition
 force applied by the machine to overcome friction/gravity
Term
 ideal machine--
Definition
 one in which work in = work outno friction/resistance
Term
Definition
 number of times a machien multiplies input force to get output force
Term
 power--
Definition
 work/time
Term
 IMA--
Definition
Term
 AMA--
Definition
Term
 How cool is Anshu?
Definition
 cooler than you
Term
 efficiency--
Definition
 output work/input workAMA/IMA
Term
 IMA of an inclined plane
Definition
 length/height
Term
 IMA of a pulley
Definition
 # of ropes holding up the movable pulley(s)
Term
 IMA of a lever
Definition
 input length/output length
Term
 IMA of a wheel and axle
Definition
Term
 Ex. of 1st class lever--
Definition
 seesaw
Term
 Ex. of 2nd class lever
Definition
 wheelbarrow
Term
 Ex of 3rd class lever
Definition
 hockey stick
Term
 3 ways machines make work easier
Definition
 ~change direction of force~tradeoff input force for input distance~tradeoff input distance for input force
Term
 position--
Definition
 the location of a point in space
Term
 relative position--
Definition
 where a point in space is located in comparison to another point in space
Term
 rate--
Definition
 any change over time
Term
 motion--
Definition
 change in position
Term
 speed--
Definition
 rate of change in position (rate of motion)
Term
 3 kinds of speed
Definition
 *constant speed: does not vary over time*instantaneous speed: rate of motion at any given instant (change in distance/change in time)*avg speed: total distance/total time
Term
 acceleration--
Definition
 rate of change in velocity(final velocity-initial velocity)/time
Term
 What is the slope of a dist vs. time graph?
Definition
 speed
Term
 What is the slope of a velocity vs. time graph?
Definition
 acceleration
Term
 If there is a flat line on a v vs. t graph, what does that mean?
Definition
 the object is moving at a constant speed; acceleration = 0
Term
 If there is a flat line on a d v. t graph, what does that mean?
Definition
 the object is not moving
Term
 mechanical energy--
Definition
 potential energy + kinetic energy
Term
 potential energy-- (gravitational)
Definition
 weight * height
Term
 kinetic energy--
Definition
 1/2 * mass * velocity^2
Term
 momentum--
Definition
 mass * velocity
Term
 law of conservation of momentum--
Definition
 momentum is neither gained nor lost, only transferred, unless acted upon by outside forces
Term
 electrolyte--
Definition
 a liquid or paste that provides the necessary ions to charge the electrodes in a battery
Supporting users have an ad free experience!