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science test- chp 1-3- freshman
are procedures used to gain, organize, and apply new knowledge about the world
a close agreement by competen observers who make a series of observations of the same phenomenon
an educated guess
a combination of a large amount of information, including well-tested hypotheses, about some aspect of the natural world
a well test theory of significant value
a push or pull
the sum of all the forces acting on an object
a quantity that has an amount, unit, and direction
a quantity that has only an amount and unit, but no direction
is a state where in no physical changes occurred it is a set of steadiness
whenever the net force on an object is zero, the object is said to be in mechanical equilibrium. you can express this mathematically
the sum of two or more vectors
is a force acting between materials touching as they move past each other
the property of an object to resist changes in its motion
newtons first law of motion
every object continues in a state of rest, or if uniform speed in a straight line, unless acted upon by a nonzero net force
is the measure of inertia
is the force of gravity on an object. it depend on mass.
the scientific unit of force