Physics chapter 9 pt 2
If the Moon were covered with water, tidal effects caused by Earth would find the Moon with
2 tidal bulges
If an object is placed exactly halfway between Earth and the Moon, it would fall toward the
Earth
Wobbles in the path of Uranus led to the discovery of
Neptune
The concept of force is fundamental to
Newton's theory of gravitation.
Which pulls on the oceans of Earth with a greater force?
Sun
Which of these three produces the greatest tidal effect on you right now?
The Earth
The difference between Newton's law as a proportion and an equation involves
The constant G
An asteroid exerts a 360-N gravitational force on a nearby spacecraft. The 360-N force on the spacecraft is directed
Toward the asteroid
We do not observe tides in a community swimming pool because
all parts of it practically the same distance from the Moon
Rate this statement: No force due to Earth's gravity acts on astronauts inside the orbiting space station.
always false
If Earth's radius somehow increased with no change in mass, your weight would
decrease
If Earth's mass decreased to one-half its original mass with no change in radius, then your weight would
decrease to half
On each given day and location, tides rise and fall at
different times
During an eclipse of the Sun the high ocean tides on Earth are
extra high
The force of Earth's gravity on a capsule in space increases as it comes closer. When the capsule moves to half its distance, the force toward Earth is then
four times greater
Inside a freely-falling elevator, you would have no
gravitational force on you or weight
You can experience weight
in a rotating habitat in space, standing on Earth's surface, and in an accelerating elevator away from earth
If the mass of Earth somehow increased with no change in radius, your weight would
increase also
As two objects moving toward each other due to gravity get closer, the acceleration of each
increases
Two objects move toward each other due to gravity. As the objects get closer and closer, the force between them
increases
When the distance between two stars decreases by one-third, the force between them
increases to nine times as much
If the Moon had twice as much mass and still orbits Earth at the same distance, ocean bulges on Earth would be
larger
If the Moon were four times as massive but twice as far from Earth, high tides on Earth would be
lower
Which is most responsible for Earth's ocean tides?
moon
Tides caused mainly by the Moon occur in Earth's
oceans, atmosphere and interior
The main reason ocean tides exist is that Moon's pull is stronger
on water closer to it then on water further away.
Which rocket would require more fuel?
one going from Earth to the Moon
The force of Earth's gravity on a capsule in space will lessen as it moves farther away. If the capsule moves to twice its distance, the force toward Earth becomes
one-fourth
The force of gravity acts on all apples on an apple tree. Some apples are twice as far from the ground as others. For the same mass these twice-as-high apples have
partically the same
For lunar tides to occur in the human body,
parts of the body would have to be appreciably closer to the Moon than other parts.
An outcome of universal gravitation is that
planets aren't cubes with sharp corners, its discovery prompted other laws of nature, prediction and discovery of planets.
If the Sun became twice as massive, your attraction to the Sun would double and your weight as measured on Earth would
quadruple
If your mass, the mass of Earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth would
quadruple
If the Sun collapsed to a black hole, Earth's gravitational attraction to it would be
remain the same
When a star collapses to form a black hole, its mass
remains the same
If you drop a stone into a hole drilled all the way to the other side of Earth (neglect the molten core), the stone will
speed up until it gets to the Earth's surface
The force of gravity acting on you will increase if you
stand on a planet with a shrinking radius
The origin of any microtides in the human body is most likely the
the earth
Which produces a greater tidal effect in your body, the Moon or a 1-kg melon held at arm's length above your head?
the melon
If you bounce up and down on a bathroom scale, what varies on the scale reading is
the normal force
A black hole is
the remains of a giant star that has undergone gravitational collapse
According to Newton, when the distance between two interacting objects doubles, the gravitational force is
the same
One side of the Moon continually facing Earth is
tidal lock
Inside a freely-falling runaway elevator, your
weight is zero
Passengers in a high-flying jumbo jet feel their normal weight in flight, while passengers in an orbiting space vehicle do not, because passengers in the space vehicle are
without support forces
When you step on a weighing scale at noon, Earth pulls you downward and the overhead Sun pulls you upward. The reason the Sun's pull doesn't decrease your weight at noon is because
you, the scale, and earth are in free fall