Shared Flashcard Set

Details

8th Grade Physics Chap. 2
Physics Notes
31
Physics
8th Grade
02/20/2012

Additional Physics Flashcards

 


 

Cards

Term
MOTION
Definition
THE STATE IN WHICH ONE'S OBJECTS DISTANCE FROM ANOTHER IS CHANGING.
Term
DISTANCE
Definition
THE TOTAL LENGTH OF THE ACTUAL PATH BETWEEN TWO POINTS.
Term
DISPLACEMENT
Definition
THE LENGTH AND DIRECTION OF A STRAIGHT LINE BETWEEN STARTING AND ENDING POINTS.
Term
SPEED
Definition
SPEED = DISTANCE / TIME
Term
VELOCITY
Definition
SPEED AT A GIVEN DIRECTION
Term
ACCELERATION
Definition
THE RATE AT WHICH VELOCITY CHANGES WITH TIME.
Term
ACCELERATION REFERS TO
Definition
1. INCREASING SPEED
2. DECREASING SPEED
3. CHANGING DIRECTION
Term
ACCELERATION FORMULA
Definition
ACCELERATION = FINAL VELOCITY - INITIAL VELOCITY / TIME
Term
LAW OF CONSERVATION OF ENERGY
Definition
ENERGY CANNOT BE CREATED OR DESTROYED.
Term
FORCE
Definition
A PUSH OR PULL EXERTED ON AN OBJECT.
Term
SI UNIT FOR FORCE
Definition
(N) NEWTONS
Term
BALANCED FORCES
Definition
FORCES THAT ACT ON AN OBJECT AND DOES NOT CHANGE THE OBJECT'S VELOCITY.
Term
UNBALANCED FORCES
Definition
NET FORCE IS INCREASED ON A SIDE AND CHANGES THE OBJECT'S VELOCITY.
Term
FRICTION
Definition
THE FORCE THAT ONE SURFACE EXERTS ON ANOTHER WHEN THE TWO SURFACES RUB AGAINST EACH OTHER.
Term
STATIC FRICTION
Definition
ACTS ON OBJECTS NOT MOVING. (PUSHING A HEAVY DESK ACROSS A FLOOR)
Term
SLIDING FRICTION
Definition
WHEN TWO SOLID SURFACES SLIDE OVER EACH OTHER.
Term
ROLLING FRICTION
Definition
WHEN AN OBJECT ROLLS ACROSS A SURFACE.
Term
FLUID FRICTION
Definition
WHEN A SOLID OBJECT MOVES THROUGH A FLUID (WATER, AIR, ETC...)
Term
GRAVITY
Definition
FORCE THAT PULLS OBJECTS TOWARDS EACH OTHER.
Term
MASS AND DISTANCES EFFECT ON GRAVITY
Definition
THE FORCE OF GRAVITY INCREASES WITH GREATER MASS AND DECREASES WITH GREATER DISTANCE.
Term
WEIGHT
Definition
GRAVITATIONAL FORCE EXERTED ON A PERSON OR OBJECT AT THE SURFACE OF PLANETS.
Term
GRAVITATIONAL FORCE
Definition
WEIGHT = MASS X ACCELERATION DUE TO GRAVITY
Term
FREE FALL
Definition
INSTANCE WHEN THE ONLY FORCE ACTING ON AN OBJECT IS GRAVITY. THE OBJECT IS SAID TO BE IN A FREE FALL. IT IS ACCELERATING. THE FORCE OF GRAVITY ALONE CAUSES OBJECT TO INTO A DOWNWARD DIRECTION.
Term
AIR RESISTANCE (AR/DRAG)
Definition
A TYPE OF FLUID FRICTION THAT ACTS ON OBJECTS FALLING THROUGH AIR. GREATER MASS = GREATER AIR RESISTANCE.
Term
INERTIA
Definition
THE TENDENCY OF AN OBJECT TO RESIST A CHANGE IN MOTION.
Term
NEWTON'S FIRST LAW OF MOTION
Definition
AN OBJECT WILL REMAIN AT REST OR IN MOTION AT A CONSTANT VELOCITY UNLESS ITS IS ACTED UPON BY AN UNBALANCED FORCE. AN UNBALANCED FORCE WILL CAUSE AN OBJECT TO SPEED UP, SLOW DOWN, OR CHANGE DIRECTION.
Term
NEWTON'S SECOND LAW OF MOTION
Definition
IF ONE OBJECT EXERTS FORCE ON ANOTHER OBJECT, THEN THE SECOND OBJECT EXERTS FORCE OF EQUAL STRENGTH IN THE OPPOSITE DIRECTION ON THE FIRST OBJECT.
Term
NEWTON'S THIRD LAW OF MOTION
Definition
ONE OBJECT EXERTS FORCE ON ANOTHER OBJECT, THE THE SECOND OBJECT EXERTS FORCE OF EQUAL STRENGTH IN THE OPPOSITE DIRECTION OF THE FIRST. FOR EVERY ACTION THERE IS AN EQUAL BUT OPPOSITE REACTION.
Term
CENTRIPETAL FORCE
Definition
A FORCE THAT CAUSES AN OBJECT TO MOVE IN CIRCLE.
Term
DENISTY
Definition
THE RATIO OF THE MASS OF A SUBSTANCE TO ITS VOLUME.
Term
SPEED
Definition
THE LINE ON A DISTANCE AND TIME GRAPH REPRESENTS.
Supporting users have an ad free experience!