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# 0C-Changes in Forces

### Changes in Force and Motion

TermDefinition
formula for force Force = mass x acceleration
formula for momentum momentum = mass x velocity
formula for speed (velocity) speed = distance / time
Free-Body Diagram an illustrating showing all of the forces acting on one object
inertia The tendency of an object to resist a change in motion
mass how much matter is in an object
momentum The product of an object's mass and velocity (mass x velocity)
motion An object's change in position relative to a reference point.
net force The sum of all forces acting on an object
newton SI unit of force  (N)
Newton's First Law an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's Second Law the amount of force needed to accelerate an object is dependent on the object's mass
qualitative Data in the form of recorded descriptions rather than numerical measurements.
quantitative Data that is in numbers
reference frame a system that uses coordinates or background objects to establish position
speed The distance an object travels per unit of time
Symbol for Applied Force F(A)
Symbol for Force of Magnetism F(M)
Symbol for Force of Static Electricity F(S)
Symbol for the Force of Friction F(F)
Symbol for the Force of Gravity F(G)
Symbol for the Force of Normal F(N)
Symbol for the Force of Tension F(T)
unbalanced force forces that cause a change in motion
velocity Speed in a given direction