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newtons 1st law
if the resultant force on a stationary or moving object is 0,the object will either remain still or keep moving at the same velocity
newtons 2nd law
a objects acceleration is directly proportional to the resultant force acting on it and inversely proportional to its mass.
2nd law equation
force=mass x acceleration
inertia
tendency to continue moving at same velocity. measures how difficult it is to change velocity
newtons 3rd law
whenever two objects interact, they exert equal and opposite forces on each other