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Chapter 10 Forces

Forces

QuestionAnswer
force a push or a pull exerted on an object
Newton a unit of measure that equals the force required to accelerate 1kg of mass at 1m/s2
net force the overall force on an object when all the individual forces acting on it are added together
unbalanced force forces that produce a nonzero net force which changes an object’s motion
balanced forces equal forces acting on an object in opposite directions
friction the force that one surface exerts on another when the two surfaces rub each other
sliding friction friction that occurs when one solid surface slides over another
static friction friction that acts on objects that are not moving
rolling friction friction that occurs when an object rolls over a surface
fluid friction friction that occurs as an object moves through a fluid
gravity the force that pulls objects toward each other
mass a measure of how much matter is in an object
weight a measure of the force of gravity on an object
free fall the motion of a falling object when the only force acting on it is gravity
air resistance the fluid friction experienced by objects falling through the air
terminal velocity the greatest velocity a falling object can achieve
projectile an object that is thrown in a horizontal direction
inertia the tendency of any object to resist any change in motion
momentum the product of an object’s mass and velocity
law of conservation of momentum principle that states that in a collision the total amount of momentum is saved
satellite any object that orbits around another object in space
centripetal force a force that causes an object to move in a circle
Created by: KerriReynolds
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