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force a push or pull exerted on an object in order to change the motion of the object;force has size and direction
motion an object's change in position relative to a reference point
reference point stationary object used to describe an object's motion
speed the distance traveled divided by the time interval during which the motion occurred
velocity the speed of an in a particular direction
acceleration the rate that the velocity changes over time;an object accelerates if its speed direction or both change
friction a force that oppose motion between two surfaces that are in contact
net force the combonation of all forces acting on a object
balanceed force stated when the net forces acting on an object epual to 0
unbalanced force when the net force is not 0
intera the tendency of an object to resist being moved
gravity a force of attraction between objects that is due to their masses
work the transfer of energy to an object by using a force that causes the objet to move
machine a device that helps do work either by overcoming a force or changing the direction of the object
inclined plane a simple machine that is strait
wedge a simple machine that is made of 2 inclined planes
screw consists of an inclined plane wrapped around a cylinder
lever consists of a bar that pivots at a fixed point
pulley consists of a wheel over which a rope chair or wire passes
wheel and axle a simple machine consisting of two cicurar of diffrent sizes
Created by: too.drippy.kayla