inertial mass
the amount of resistance an object has to any application of force
2nd law
imaginary line drawn between a planet and the sun sweeps out in equal areas in equal time periods
gravitational mass
if this is increased, the gravitational force it experiences will increase as result
gravitational field
region around earth in which objects experience a foece due to earth's gravity
Newton's las of universal gravitation
this suggests that objects attract other objects with a force that is proportional to the products of their masses and inversely proportional to the square of the distance between them
copernicus
first to suggest sun is in the center of the solar system
tycho brahe
though all planets except the earth orbit the Sun
Tycho Brahe
used instruments to record exact postions of the planets and the stars
kepler
used 30 years of observations made by other geeks and concluded that the planets orbit the sun
Isaac Newton
proposed the force exerted on a planet by the Sun is inversely proportional to the distance between centers of the planet and the Sun
Kepler
shape of a planet's prbit is elliptical
Newton
first ot theorize that the force that maj=kes objects faall to Earth is the same force that the Sun exerts on the planets
3rd
relates the motion of more than one object about a single body
1st`
describes the shape of the planets' orbit
1st
states that the Sun is located at one focus of a planet's orbit (off- center)
3rd
(Ta/Tb)^2=(Ra/Rb)^3
2nd
imaginary line drawn from a planet to the sun will sweep out equal areas in equal time intervals
2x
if mass is double gravity will...
1/4x
if distance is doubled gravity will....
6x
if one mass is doubled and another mass is tripled gravity will
horizontal, vertical
The motion of a projectile has both ___ and ___ components.
9.81 m/s^2
projectile fired horizontally will accelerate toward earth at a rate of this number
horizontal
if the magnitude of this component of a projectile's motion is great enough, the projectile will fall to earth at the same rate that the Earth Curves away from the projectile.
air resistance
A projectile fired horizontally from less than 150km above the surface of the Earth will fall back to Earth no matter how fast it is traveling because of what
orbit
an an object that falls to earth at the same rate that Earth curves away from the object is said to be in what?