17 terms

PS 100 Chapter 2

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
a push or pull on an object
the speed in a particular direction of a moving body
rate of change of velocity per unite time, or change of velocity divided by the time required for the change
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
the characteristic of a body which determines how much it accelerates when a force is applied
a measure of the force of gravity pulling on an object
Mass x Acceleration
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