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physical science ch3

QuestionAnswer
inertia the tendency of an object to resist a change in motion
centripetal acceleration a type of acceleration that acts to accelerate an object toward the center of the circle
newton base SI unit to measure weight
momentum a property of a moving object resulting from the product of its mass and velocity
net force an object at Rest on the surface of earth
sliding friction this causes a box you're pushing across the floor to stop when you stop pushing, sliding motion
terminal velocity the largest velocity reached by a flying object
free fall if the only force acting on an object is gravity, the object is said to be in free fall
conservation of momentum law when a bowling ball strikes the pins,the momentum last by the bowling ball is equal to the momentum gained by the pins
gravitational field a region of space that has a phsyical quantity at every point
air residence a force exerted by air of a moving object
centripetal force acceleration towards the center of a curved path
weight the measure of the force of gravity on an object, w=mg
static friction 2 surfaces that are not moving past each other, no motion
newtons 1st law of motion an object in motion (or at rest) tends to stay in motion (pr at rest) unless acted on by an outside force
newtons 2nd law of motion an objects acceleration is in the same direction as the net force of the object and is equal to the net force exerted on it and dived by mass. Fnet=ma
newtons 3rd law of motion when one objects exerts a force on a second object exerts a force on a second object exerts an equal but opposite force on the first. (every action has an equal opposite reaction)
gravity the force that every object in the universe exerts on every other object. it depends on the masses of the objects and distance between them
constant velocity
unbalanced forces
friction always opposes motion.
rolling friction has a rolling motion
force a push or a pull on an object, vector unit
Created by: bittsygirl
 

 



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