Section 1
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an earth satellite is in an elliptical orbit. the satellite travels fastest whe it is
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Last updated
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Date created
Mar 1, 2020
Cards (82)
Section 1
(50 cards)
an earth satellite is in an elliptical orbit. the satellite travels fastest whe it is
nearest the earth
inside a free falling elevator your
apparent weight is 0
which pulls on the oceans of the earth with the greater force
the sun
if the sun were twice as massive
its pull on earth would double and pull of earth on sun would double
how far must one travel to get away from earth's grav field
can't travel far enough
when a star collapses to form a black hoe, its mass
remains the same
passengers in a high flying jet feel their normal weight in flight while passengers in the orbiting space shuttle do not this is b/c the passengers in the shuttle are
above earth's atmosphere
there are no tides to be seen in pools b/c
all parts are practically same distance from moon
the fastest moving planet in the solar system is
the planet nearest the sun
half way to the center of the planet of uniform density, your weight compared to at the surface would be
1/2
tides rise and fall
greatly different distances in different places
if the mass of earth somehow increased with no change in radius, your weight would
increase also
an asteroid exerts a 360N gravitational force on a nearby spacecraft. the force is directed
toward the asteroid
newton discovered
that gravity is universal
the direction of a gravitational field is
in the same direction as the gravitational attraction
the amount of grav force that acts on the space shuttle while in orbit is
almost as much as the shuttle's weight on earth's surface
inside a freely falling elevator, there would be no
apparent weight for you
during an eclipse of the dun the high ocean tides on earth are
extra high
which is most responsible for ocean tides
the moon
a very massive object A and less massive object B move toward each other under the influence od gravitation, which force is greater
same
the reason the moon does not crash into the earth is that the
moon has sufficient tangential speed
according to newton, doubling the distance between two interacting objects
divides by 4 the gravitational force between them
an asteriod exters a 360N grav force on a nearby spacecraft, if the spacecraft moves to a point 3 times as far from the center of the asteroid, the force will be
40N
what prevents satellites from falling
nothing, continually fall around earth
a woman on earth's surface mass of 50 kg and weight of 490N if the woman were floating freely inside a space habitiat far from earth, she would have
less weight, same mass
the best time for digging clams wjen the tide is extra low is during the time of the
new or full moon
the earht's gravitational field extends
both inside and outside the earth and throughout the entire universe
tidal forces in general are the result of
unequal forces acting on differet parts of a body
the circular orbit of a satellite orbiting the earth is characterized by a constant
speed, acceleration and radial distance
according to kepler, paths of planets are...
ellipses
the tangential velocity of an earth satellite is its velocity
parallel to the surface of the eath
if you drop a stone into a hole drilled all the way to the other side of the earth, the stone will
speed up until it gets to thecenter of earth
if the radius of earth somhow decreased with no change in mass, your weight would
increase
planets would crash into the sun if it weren't for
their tangential velocities
a woman who normally weighs 400N stands on top of a very tall ladder so she is one earth radius above earth's surface. how much would she weigh there
100 N
if your mass, the mass of the earth, and the mass of everything in the solar sysyem were twice as much as it is now, yet everything stayed the same size, your weight on earth would
quadruple
it takes pluto a longer time to travel around the sun than the earth b/c pluto
has farther to go and goes slower
an object is placed halfway between earth and moon, the object will fall toward
earth
a black hole is
simply the remains of a giant star that has undergone gravitational collapse
what is the force of gravity on a 500 newton woman standing on earth's surface
500 N
the main reason ocean tides exist is rhat the pull of the moon
is greater on oceans closer to the moon and less on oceans farther from the moon
if the sun collapsed into a black hole, the earth's grav attraction to it would be
the same
a weightless astronaut is an orbiting shuttle is
like the shuttle, pulled by earth's gravitation
for astronauts inside the orbiting shuttle, there is no force of gravity acting on them this statement is
always false
2 objects move toward each other b/c of gravity. as the objects get closer and closer, the acceleration of each
increases
according to newton, the greater the masses of interacting objects, the
greater the gravitational pull between them
jupiter is 300 times as massive as earth yet its surface you would weight only about 3 times as much, this is b/c
jupiter's radius is 10 times the earth's radius
if the earth's mass decreased to 1/2 its original mass with no change in radius, then your weight wouldd
decrease to 1/2 your original weight
2 objects move toward each other b/c of gravity. as the objects get closer and closer, the force between them
increases
with respect to the stars, the moon
and the earth circle each other
Section 2
(32 cards)