Term
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Definition
terrestrial- on earth
celestial- skies |
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Term
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Definition
natural- where the earth wants it, smoke rises, rocks fall
violent- anything that requires push or pull |
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Term
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Definition
Terrestrial.
based on four elements- wind air water fire
object goes where earth wants it
Vertical |
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Term
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Definition
Terrestrial.
anything that requires a push or pull that will eventually stop unless push/pull again.
Horizontal |
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Term
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Definition
sun and planets around earth
4 elements plus ether
Perfect and Circular |
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Term
| Galileo's Law for falling |
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Definition
neglecting air resistance, if two objects are dropped together will fall together regardless of weight, shapes or materials used.
(gave natural motion a fatal blow) |
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Term
Newton's First Law:
Law of Inertia |
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Definition
if there is nothing to stop it, it will go forever
rest will stay at rest motion will stay in motion
when friction is at 0
When there is no force acting on a moving object it keeps moving forever. |
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Term
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Definition
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Term
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Definition
| distance traveled per unit time |
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Term
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Definition
speed needed to cover same distance same time at unchanging speed
higher average speed at constant speed. |
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Term
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Definition
speed at an exact moment in time.
speedometer |
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Term
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Definition
speed specified by one number
30 MPH
scalar- speed- specific |
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Term
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Definition
speed specified by number and direction
30 MPH South
vector- velocity- variety |
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Term
Acceleration
a= change in V/T to change |
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Definition
change in velocity over time. Can be speed or direction.
if remains the same no acceleration |
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Term
| Acceleration Due to Gravity (g) |
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Definition
any free falling object's acceleration is 9.8 m/s^2
speed is proportional to time falling |
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Term
Speed of Free falling body
S= a*t |
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Definition
The speed of a falling body is directly proportional to the time the object has been falling.
if the object is falling the acceleration is acceleration due to gravity (g)
speed= acceleration * time |
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Term
Distance of Free Falling Body
D= 1/2 * a * t^2 |
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Definition
the distance of a free falling object is directly proportional to the square of the time the object has been falling
for all cases of constant acceleration, if the object is falling, it is the acceleration due to g (9.8m/s^2)
distance= 1/2 acceleration * Time^2 |
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Term
Newton's Second Law
Fnet = m*a |
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Definition
Acceleration is proportional to net force, but inversly proportional to the mass.
acceleration = Fnet/m
Fnet = mass * acceleration
harder to move, more inertia, more mass |
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Term
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Definition
f net = f1-f2 if forces are oppisite
f net = f1+f2 if forces are the same |
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Term
|
Definition
terrestrial- on earth
celestial- skies |
|
|
Term
|
Definition
natural- where the earth wants it, smoke rises, rocks fall
violent- anything that requires push or pull |
|
|
Term
|
Definition
Terrestrial.
based on four elements- wind air water fire
object goes where earth wants it
Vertical |
|
|
Term
|
Definition
Terrestrial.
anything that requires a push or pull that will eventually stop unless push/pull again.
Horizontal |
|
|
Term
|
Definition
sun and planets around earth
4 elements plus ether
Perfect and Circular |
|
|
Term
| Galileo's Law for falling |
|
Definition
neglecting air resistance, if two objects are dropped together will fall together regardless of weight, shapes or materials used.
(gave natural motion a fatal blow) |
|
|
Term
Newton's First Law:
Law of Inertia |
|
Definition
if there is nothing to stop it, it will go forever
rest will stay at rest motion will stay in motion
when friction is at 0
When there is no force acting on a moving object it keeps moving forever. |
|
|
Term
|
Definition
|
|
Term
|
Definition
| distance traveled per unit time |
|
|
Term
|
Definition
speed needed to cover same distance same time at unchanging speed
higher average speed at constant speed. |
|
|
Term
|
Definition
speed at an exact moment in time.
speedometer |
|
|
Term
|
Definition
speed specified by one number
30 MPH
scalar- speed- specific |
|
|
Term
|
Definition
speed specified by number and direction
30 MPH South
vector- velocity- variety |
|
|
Term
Acceleration
a= change in V/T to change |
|
Definition
change in velocity over time. Can be speed or direction.
if remains the same no acceleration |
|
|
Term
| Acceleration Due to Gravity (g) |
|
Definition
any free falling object's acceleration is 9.8 m/s^2
speed is proportional to time falling |
|
|
Term
Speed of Free falling body
S= a*t |
|
Definition
The speed of a falling body is directly proportional to the time the object has been falling.
if the object is falling the acceleration is acceleration due to gravity (g)
speed= acceleration * time |
|
|
Term
Distance of Free Falling Body
D= 1/2 * a * t^2 |
|
Definition
the distance of a free falling object is directly proportional to the square of the time the object has been falling
for all cases of constant acceleration, if the object is falling, it is the acceleration due to g (9.8m/s^2)
distance= 1/2 acceleration * Time^2 |
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|
Term
Newton's Second Law
Fnet = m*a |
|
Definition
Acceleration is proportional to net force, but inversly proportional to the mass.
acceleration = Fnet/m
Fnet = mass * acceleration
harder to move, more inertia, more mass |
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Term
|
Definition
f net = f1-f2 if forces are oppisite
f net = f1+f2 if forces are the same
determines acceleration
when objects not accelerating, Fnet must equal 0 |
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Term
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Definition
on the surface of earth, force exerted by gravitational pull of earth on an object
Tension = Weight
Weight= mass * gravity (9.8) |
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Term
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Definition
| upward push. equal to its weight (downward push) |
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Term
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Definition
tension = weight
w= mg
so t= mg |
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Term
Newton's 3rd Law
The Law of Force Pairs |
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Definition
| when you push an object the object pushes back at you. |
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Term
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Definition
k= spring constant
smaller the constant more it stretches
x= distance compressed or stretched |
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Term
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Definition
the momentum of an object of mass (m) moving with velocity (v)
Vector- speed w direction |
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Term
| Conversion of momentum (p) |
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Definition
| if there are no external forces, the total momentum is conserved (unchanged), regardless of parts acting upon each other |
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Term
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Definition
force due to gravity = weight (m*g)
Newton said- same force that holds moon in orbit that pulls apple from tree to ground. |
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Term
Law of Gravitation
F gravity= g * m1*m2/r^2 |
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Definition
if mass doubles, G force doubles.
if g force divided by 4 the separation of masses doubles
two forces get farther from each other G Force gets smaller
responsible for life cycle of stars |
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Term
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Definition
depends on mass.
formed by gravitational attraction of and collapse of hydrogen clouds |
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Term
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Definition
| in the sun competition between gravitational pull and tendency of very hot matter to expand |
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Term
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Definition
follows the exhaustion of all its fuel
outer layers blow away only core left, (planetary nebula) continues to contract until size of earth-- ends white dwarf |
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Term
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Definition
| red and purple areas visible in light blue in x ray light |
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Term
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Definition
stars larger then 10 masses of the sun go through multiple collapses and cycles fusing helium carbon - iron causes star to implode and explode
10% remains |
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Term
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Definition
mass of 10- 30 suns gravitational force strong enough that atoms and nuclei don't exist. electrons collapse into protons and form neutrons
solidly packed ball of neutrons |
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Term
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Definition
| 30 times mass of sun star collapses to single point |
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Term
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Definition
when a force (F) acts on an object that moves it a distance (d) in the direction of force (F)
work = Force * distance |
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Term
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Definition
the capacity to do work. a system has energy whenever it has the capacity to do work
Gravitational Potential Energy (Egrav) |
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Term
Gravitational Potential Energy
E grav = m*g*h |
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Definition
the product of weight times the height above the ground
Potential energy = weight (m*g) * height |
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Term
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Definition
| Work is a transfer energy from one system to another |
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Term
Kinetic Energy
E kin = 1/2 mv^2 |
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Definition
the energy of motion related to its velocity and its mass.
e Kin = 1/2 mass* velocity^2 |
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Term
Elastic Potential Energy
E spring = 1/2 k*x^2 |
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Definition
x= distance spring is stretched/ compressed
k= spring constant |
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Term
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Definition
energy is always conserved, although it may change it's form
no execptions |
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Term
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Definition
| electrical, chemical, nuclear, radient, mass energy |
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Term
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Definition
| sum of Kinetic and Potential |
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Term
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Definition
work done divided by time to do it
power= work/ time
Watts |
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