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# forces vocabulary 1

### vocbulary

momentum the product of an object's mass its velocity
Formula for momentum m=pv
law of conservation of momentum the total mo
force a push or a pull that gives energy to an object
units of force forces are 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 it's motion.
Balance Force the net force acting on an object is zero
unbalanced forces the net force acting on an object is not zero
Magnitude a force that one surface exerts on another when the two surfaces are in contact withe each other
static friction friction between non-moving objects
kinetic friction friction between moving objects
sliding friction friction between objects that slide (rub) against each other
rolling friction occurs when an object rolls over surface
fluid friction occurs when an object moves through a fluid or a gas
Newton's First law of motion objects at rest will stay at rest & objects in motion will stay in motion at a constant velocity unless acted on by an unbalanced force
Newton's second law of motion the net force acting on an objects is a equal to the product of the object's mass & acceleration
Newtons third law of motion for every action 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 each other; strength of attraction depends on the objects' masses and distances from each other
Freefall the the motion of an object when GRAVITY is the only force acting on it
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 an object orbits another object at a rate equal to the 2nd object's rate of ratation
Created by: derick-gavin