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# forces vocab 2012

### science mrs. patalunes

momentum the product of an objects mass and its velocity
force a push or a pull that gives energy to an object
net force the total of all the forces acting on an object
inertia the tendency of matter to resist a change in its motion
balanced forces the net force IS 0
unbalanced forces the net force is NOT 0
static friction the force that occurs when 2 surfaces touch each other
kinetic friction the force that occurs when 2 surfaces move against each other
sliding friction occurs when 2 objects rub against each other
fluid friction occurs when an object moves through a fliud or gas(like water or air)
rolling friction occurs when an object folls over a surface
newton's 1st law of motion (law of inertia) forces are unbalanced. ojects at rest tend to stay in motion, unlees acted on by an unbalanced force and objects in motion tend to stay in motion, at a constant velocity unlees acted on by an unbalanced force
newton's 2nd law of motion (law of acceleration) forces are ____________; the net force on an object to the product of the mass and acceleration
newton's 3rd law of motion (the law of interaction) "action-reaction" if 1 object exerts a force on another object, then the second object exerts a force of a equal strength in the opposite direction on the 1st object.
law of universal gravitation ________ objects in the universe ________ each other, the size of the force created depends on the ________ of the object and the ________ between the objects
freefall the motion of an object when ___________ is the only force acting on a object.
terminal velocity greatest velocity of a particular falling object where the force of __________ is _____________ to the force of _____________________ on a particular object
weight a measure of the force of gravity on an object
magnitude the amount of something or the size of something; magnitude is never negitive
units of force forces are measured in newtons (N)
law of conservation of momentum the ________ momentum of any group of objects remains ________ unless outside forces (like gravity or friction) also act on the objects.
momentum formula momentum= the product of an object's _______ and its ___________ (mass of object) x (velocity of object) p=mv
mass the amount of matter in something
centripetal force any force causes an object to move in a circle.
geosynchronous orbit satellites orbit the earth at the same rate as earth rotates, therefore, a satellite is always above the same spot on the earth
Created by: LeeAnnaEP8