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, vector quantity that involves both magnitude and direction
scalar a quantity that does not involve a direction
average speed formula total distance/ time
d/t
slope of velocity-versus-time graph acceleration
Newton's second law
Newton's third law for every action there is an equal but opposite reaction (action/ reaction pair)
newton kg m/s^2
unit of force
inertia the property of objects to naturally resist changes in their states of motion
weight (of an object) the gravitational force exerted on it by the Earth or whatever planet Fw or Fg= mg
normal force component of force that's perpendicular to the surface