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science vocab chap 3

forces

QuestionAnswer
newtons 1st law of motion an object at rest stays at rest and and object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalenced force
newtons 2nd law of motion the acceleration of an object as produced by a net force is directly propotional to the magnitude of the net force, in the same directon as the net force,and inversely prportional to the mass of the object
newtons 3rd law of motion for every action there is an equal and opposite reaction
friction force that opposes moion between two touching surfaces
static friction the friction betwen two sufaces that are not moving past eachother
sliding friction the force that oppposes the motion of two surfaces sliding past eachother
rolling friction the friction beten a rollig object and the surface it rolls on is rolling friction
air resistnce force of air resistance is opposite direction to the force of gravity
terminal velocity highest velocity that a falling object will reach
gravity force that attracts things to another
the law of universal gravity any two masses exert an attractive force on eachother
weight the gravitational force exerted on an object
projectile motion anything thats thrown or shot through the air
centripeal acceleration acceleration toward the center of a curved or circular path
centripeal force an unballnced force
momentum the productofits mass and velocity
law of conservation of momentum if a group f objects exerts force only on eachother their total momentum doesnt change
Created by: BAB on 2010-03-08



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