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# Physics Review

force a push or a pull
balanced forces forces on an object that combine to give a zero net force and do not change the motion of the object
unbalanced forces the forces acting on a object that cause a change in velocity; making the object speed up, slow down, or change direction
net force the combination of all forces acting on an object
at rest a speed of zero
speed distance divided by time
direction the path that an object is moving or facing
motion a change in an object's position
friction the force that opposes the motion of one surface as it moves across another surface
velocity speed with direction
distance size of the gap between two places
rate a comparison of two quantities measured in different units
acceleration a change in velocity (speed or direction)
Newton's 1st law an object in motion tends to stay in motion & an object at rest stays at rest unless acted upon by an outside force.(Law of Inertia)
Newton's 2nd law the acceleration of an object depends on the mass of the object and the amount of force applied (F=ma)
Newton's 3rd law For every action there is an equal and opposite reaction
inertia the tendency of an object to resist any change in its motion
magnitude The great size or importance of something
action movement caused by a force
reaction resistance or opposition to a force, influence or movement
law of conservation of energy the law that states that energy cannot be created or destroyed but can be changed from one form to another
Created by: jistre