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Chapter 2

Motion, Forces, and Newton's Laws

TermDefinition
motion the process of changing position
reference point the starting point you use to describe the motion or position of an object
distance the total length of your path
displacement the distance between your initial, or starting, position and your final position
speed the distance an object moves divided by the time it took to move that distance
velocity the speed and direction of an object's motion
acceleration the measure of the change of velocity during a period of time
force a push or pull on an object
contact force a push or a pull applied by one object to another object that is touching it
noncontact force a force that pushes or pulls an object without touching it
friction a contact force that resists the sliding motion between two objects that are touching
gravity a noncontact attractive force that exists between all objects that have mass
balanced forces when the net force on an object is 0 N, the forces acting on the object is
unbalanced forces when the net force acting on an object is not 0, the forces acting on the object are
inertia the tendency of an object to resist a change in motion is called
Newton's first law of motion states that if the net force acting on the object is zero, the motion of the object does not change
Newton's second law of motion states that the acceleration of an object is equal to the net force applied to the object divided by the object's mass
Newton's third law of motion says that when one object exerts a force on a second object, the second object exerts a force of the same size, but in the opposite direction, of the first object
force pair when two objects exert forces on each other, the two forces are a
Created by: booecam3836
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