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Newtons First Law of Motion
an object at rest tends to remain at rest and an object in motion tends to remain in motion (in a straight line at a constant speed- no acceleration) unless acted on by a net force
often called law of inertia
Inertia
the property of an object that resists change in motion
when stationary, difficult to move
when moving, difficult to stop
depends on mass
when does object have greater inertia?
if object has more mass
Calculating Net Force
When calculating net force, remember, force has direction