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# SCIENCE-FORCES VOCAB

MOMENTUM THE PRODUCT OF AN OBJECT'S MASS AND ITS VELOCITY
FORMULA FOR MOMENTUM m = pv
lAW OF CONSERVATION OF MOMENTUM The total momentum of any group of objects remains the same unless outside forces also act on the object
FORCE a push or pull that gives energy to an object
UNITS OF FORCE Forces aare measured in Newtons; N
NET FORCE The total of all the forces acting on an object
INERTIA The tendency of matter to resist a change in motion.
BALANCED FORCES the net force acting on an object is zero
UNBALANCE FORCES The net force acting on an object is NOT zero
MAGNITUDE the amount (size) of a measurement
FRICTION a force that one surface exerts on another when the two surfaces are in contact with eachother
STATIC FRICTION Friction between non-moving objects
KINETIC FRICTION Friction between moving objects
SLIDING FRICTION Friction between objects that slide (rub) against eachother
ROLLING FRICTION occurs when an object rolls over a surface
FLUID FRICTION occurs when an object moves through a fluid or a gas
NEWTONS FIRST LAW OF MOTION Objects at rest will stay at reast & objects in motion will stay in motion at a constant velocity unless acted on by an unbalanced force
NEWTONS SECOND LAW OF MOTION The net force acting on an object is equal to the product of the objects mass & acceleration
NEWTONS THIRD LAW OF MOTION For every action force there is a reaction force that is equal, but acts in the opposite direction
LAW OF UNIVERSAL GRAVITATION All objects in the universe are attracted to eachother the size of the attraction depends on the mass of the objects and the distance between them.
FREEFALL the motion of an object when GRAVITY is the only force acting on it
TERMINAL VELOCITY greatest velocity of a falling object; occurs when the force of GRAVITY is EQUAL to the force of FRICTION
WEIGHT a measure of the force of GRAVITY on an object
MASS the amount of matter in something
CENTRIPETAL FORCE the force that is pulling an object in circular motion towards the center of the circle
GEOSYNCHRONOUS ORBIT occurs when the object orbits another object at a rate equal to the 2nd objects rate of rotation
Created by: StephanieB.