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Top 4: F&M

Topic 4: Forces & Motion

TermDefinition
motion the state in which one object's distance from another is changing
reference point a place or object used for comparison to determine if an object is in motion
force a push or pull exerted on an object
newton a unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second
friction the force that two surfaces exert on each other when they rub against each other
net force the overall force on an object when all the individual forces acting on it are added together
speed the distance an object travels per unit of time
instantaneous speed the speed at a particular instant in time
average speed total distance divided by the total time travelled
slope the steepness of a graph line; the ratio of the vertical change (the rise) to the horizontal change (the run)
velocity speed in a given direction
acceleration the rate at which velocity changes
Newton's First Law of Motion states that an object at rest with remain at rest unless acted upon by a nonzero net force
inertia the tendency of an object to resist a change in motion
Newton's Second Law of Motion states that size and direction of a net force equals the mass time the acceleration
Newton's Third Law of Motion states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object
static friction acts on objects when they are resting on a surface
rolling friction when an object rolls across a surface
sliding friction occurs when two solid surfaces slide across each other
fluid friction occurs when a solid object moves through a fluid
weight a measure of the force of gravity acting on an object
Created by: muellershauna
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