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Newton's First Law

Every object at rest, or in uniform motion, will remain in that state of motion unless compelled to do otherwise by forces acting upon it

uniform motion

motion at a constant speed in a straight line

state of uniform motion

the condition of an object when no unbalanced forces act upon it; a state of motion always refers to being at rest or in uniform motion

force

a push or pull on an object

velocity

the speed in a particular direction of a moving body

acceleration

rate of change of velocity per unite time, or change of velocity divided by the time required for the change

centripetal

towards a center

Newton's Second Law

the net force of an object is equal to the product of it's acceleration and mass.

unbalanced forces

the portion of the total force that is unopposed by other forces and so will cause an acceleration; an unbalanced force means that the net force is not zero

mass

the characteristic of a body which determines how much it accelerates when a force is applied

weight

a measure of the force of gravity pulling on an object

Force=

Mass x Acceleration

Acceleration=

Force/Mass

Forces occur...

only when two things interact with each other

All forces result from...

interactions between pairs of objects, each object exerting a force on the other; the two resulting forces have the same strength and act in exactly opposite directions

Force of you on the Earth=

Force of the Earth on you

Earth's mass x Earth's acceleration=

Your mass x your acceleration

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