Thursday, February 4, 2010

Let's learn some Physics, shall we?

Newton's First Law:
"An object's velocity remains constant unless the object is acted upon by and external net force."

translation/break down:
velocity is the rate  of diplacement or the rate of change of position. Key thought, "How fast and in what direction."
constant can say the object is stationary or moving. This is at zero (continuing in a state of rest) or not zero (uniform motion in a straight line).
external net force is the total force acting upon it. This changes when the object is not at zero.

terms:
reference frame- it is those things we say are not moving, to which we refer when describing the motions of other things.
inertia- is an intrinsic property of motion; the state of an object staying in motion or not in motion.
mass- is a measure of inertia (in kilograms).
weight- is the force due to gravity (in newtons).

clicker question findings:
motion is not an intrinsic property of motion.
an object at rest will remain at rest.
an object in motion will remain in motion.
motion is uniform, constant in both speed and direction.
equilibrium is the name for "the net external force equals zero."
1 liter of water (which is it's measure in volume) has a mass of 1 kilogram (of inertia) and 10 Newtons of force (due to gravity).


This is just a little bit of the stuff to know for the first test. I feel confident because I have been able to explain it to others. A lot of those times with out having to read it. Little Joey, I hope you are on my side- let's do some physics!

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