Physics I Honors Chapter 9 Test
When the distance between two stars decreases by one-third, the force between them decreases by one third increases to twice as much increases to 9 times as much decreases by 1/9th
increases to 9 times as much
Which rocket would require more fuel? one going from the Moon to Earth one going from Earth to the Moon both the same
one going from Earth to the Moon
Half-way to the center of a planet of uniform density, your weight compared to that at the surface would be one-quarter one-half. three-quarters the same as at the surface
one-half.
For lunar tides to occur in the human body - most of the body would have to be in the liquid state - Earth's gravitation would have to be incredibly small - parts of the body would have to be appreciably closer to the Moon than other parts - none of the above
parts of the body would have to be appreciably closer to the Moon than other parts
Suppose the Moon had twice the diameter but the same mass and same orbital distance from Earth. In that case, the high tides on Earth would be lower unequal in size higher practically the same
practically the same
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 1/4 the weight 1/2 the weight practically the same weight
practically the same weight
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 be the same double quadruple be eight times as much as now
quadruple
The force of gravity acting on you will increase if you burrow deep inside Earth stand on a planet with a shrinking radius both of these neither of these
stand on a planet with a shrinking radius
Newton discovered gravity that gravity is universal neither of these both of these
that gravity is universal
Which of these three produces the greatest tidal effect on you right now? the Moon the Sun the Earth
the Earth
The difference between Newton's law as a proportion and an equation involves the constant G the equal sign one being a vector and the other not magnitude and direction
the constant G
Tidal bulges on the Moon involve the concept of torques elasticity slight water on the Moon magnetism
torques
A weight watcher who normally weighs 400 N stands on top of a very tall ladder so she is one Earth radius above Earth's surface. How much is her weight there? 0 N 100 N 200 N 400 N
100 N
If the Moon were covered with water, tidal effects caused by Earth would find the Moon with 1 tidal bulge 2 tidal bulges 3 tidal bulges 4 tidal bulges
2 tidal bulges
An asteroid exerts a 360-N gravitational force on a nearby spacecraft. If the spacecraft moves to a position three times as far from the center of the asteroid, the force will be zero 40 N 120 N 360 N
40 N
What is the force of gravity on a 500-N woman standing on Earth's surface? 50 N 250 N 500 N none of these
500 N
If an object is placed exactly halfway between Earth and the Moon, it would fall toward the Earth Moon neither of these
Earth
The origin of any microtides in the human body is most likely the Sun Moon Earth
Earth
The planet Jupiter is about 300 times as massive as Earth, yet on its surface you would weigh only about 3 times as much because your mass is 100 times less on Jupiter. Jupiter is significantly farther from the Sun. Jupiter's radius is about 10 times Earth's radius. you are 100 times more weightless there.
Jupiter's radius is about 10 times Earth's radius.
Which is most responsible for Earth's ocean tides? Moon Sun both contribute equally
Moon
Wobbles in the path of Uranus led to the discovery of Jupiter Mars Neptune none of these
Neptune
The concept of force is fundamental to Newton's theory of gravitation Einstein's theory of gravitation both of these neither of these
Newton's theory of gravitation
Which pulls on the oceans of Earth with a greater force? Moon Sun both pull equally
Sun
Half-way to the center of a completely hollow planet with a thin uniform shell, your weight would be one-quarter of your weight on the surface one-half of your weight on the surface the same as at the surface Zero
Zero
The universal gravitational constant G was first measured before Newton's time by Newton after Newton's time
after Newton's time
An outcome of universal gravitation is that planets aren't cubes with sharp corners other laws of nature were discovered planets were predicted and discovered all of the above
all of the above
Tides caused mainly by the Moon occur in Earth's oceans atmosphere interior all of the above
all of the above
You can experience weight standing on Earth's surface in an accelerating elevator away from Earth in a rotating habitat in space all of the above
all of the above
You experience weightlessness in the absence of a supporting surface. momentarily when you step off a chair. in a freely falling elevator all of the above
all of the above
We do not observe tides in a community swimming pool because gravitation on the small mass of water is negligibly small it is shallow compared to the ocean all parts of it are practically the same distance from the Moon they are masked by the much stronger pull of Earth gravity
all parts of it are 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 true while in orbit sometimes true while in orbit always false
always false
A very massive object A and a less massive object B move toward each other under the influence of gravity. Which force, if either, is greater? the force on A the force on B both forces are the same
both forces are the same
Earth's gravitational field extends only above and beyond Earth's surface and cancels inside Earth both inside and outside Earth and throughout the entire universe neither of these
both inside and outside Earth and throughout the entire universe
If the Sun were twice as massive its pull on Earth would double the pull of Earth on the Sun would double both of these neither of these
both of these
Surrounding a magnet is a magnetic field. Surrounding an electron is an electric field. Surrounding Earth is a gravitational field an alteration in space in which mass experiences a force both of these
both of these
To make a profit, a business student purchases metal by weight at one altitude and sells it at the same price per pound at another altitude. The student should buy at a high altitude and sell at a low altitude buy at a low altitude and sell at a high altitude. it makes no difference
buy at a high altitude and sell at a low altitude
If Earth's radius somehow increased with no change in mass, your weight would increase also decrease stay the same all of the above
decrease
If Earth's mass decreased to one-half its original mass with no change in radius, then your weight would a decrease to 1/4 decrease to half stay the same none of the above
decrease to half
On each given day and location, tides rise and fall at about the same time exactly the same time different times
different times
During an eclipse of the Sun the high ocean tides on Earth are extra high extra low not significantly different
extra high
How far must one travel to escape Earth's gravitational field? to a region above Earth's atmosphere to a region well beyond the Moon to a region beyond the solar system forget it; you can't travel far enough
forget it; you can't travel far enough
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 twice three times greater four times greater none of the abpove
four times greater
According to Newton, the greater the masses of interacting objects, the less the gravitational force between them greater the gravitational force between them greater the force between them by the square of the masses all of the above
greater the gravitational force between them
The direction of a gravitational field is in the same direction as gravitational attraction away from the center of gravity of an object opposite to the direction of gravitational attraction
in the same direction as gravitational attraction
If the mass of Earth somehow increased with no change in radius, your weight would increase also decrease stay the same all of these
increase also
As two objects moving toward each other due to gravity get closer, the acceleration of each decreases remains constant increases
increases
Two objects move toward each other due to gravity. As the objects get closer and closer, the force between them increases decreases remains constant
increases
If the Moon had twice as much mass and still orbits Earth at the same distance, ocean bulges on Earth would be smaller larger unequal in size not significantly different
larger
When you weigh yourself on a bathroom scale on a slight incline instead of a level surface, your weight reading on the scale will be less no different more
less
Each of us weighs a tiny bit less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the gravitational field is shielded inside the building mass of the building above slightly attracts us upward both of these neither of these
mass of the building above slightly attracts us upward
The amount of gravitational force that acts on a space vehicle while in Earth orbit is nearly zero. nearly as much as the vehicle's weight on Earth's surface the same as the vehicle's weight on Earth's surface
nearly as much as the vehicle's weight on Earth's surface
The best time for digging clams (when the low tide is extra low) is during the time of the new or full moon half moon quarter moon
new or full moon
A hollow spherical planet is inhabited by people who live inside it, where the gravitational field is zero. When a very massive spaceship lands on the planet's surface, inhabitants find that the gravitational field inside the planet is still zero non-zero, directed toward the spaceship non-zero, directed away from the spaceship
non-zero, directed toward the spaceship
All places on Earth would have high tides at the same instant if the Moon did not revolve Moon did not rotate Sun did not revolve none of the above
none of the above
There would be only one ocean tide per 24-hour day if the Earth and Moon were equally massive Moon were more massive than Earth Sun's influence on the tides were negligible none of the above
none of the above
Two planets in space gravitationally attract each other. Double the masses and the distance between them, and the force between them becomes one fourth half as much four times as much none of the above
none of the above
If the Sun became twice as massive, your attraction to the Sun would double and your weight as measured on Earth would double quadruple not change
not change
The main reason ocean tides exist is that Moon's pull is stronger than the pull of the Sun. on water closer to it than on water farther away on Earth's oceans than on Earth itself all of the above
on water closer to it than on water farther away
According to Newton, when the distance between two interacting objects doubles, the gravitational force is one half one fourth the same twice as much
one fourth
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 half three-quarters one fourth none of the above
one fourth
Earth is presently accelerating toward the Sun (centripetal acceleration). If the Sun collapsed into a black hole, this acceleration would increase decrease remain the same
remain the same
If the Sun collapsed to a black hole, Earth's gravitational attraction to it would increase decrease remain the same
remain the same
When a star collapses to form a black hole, its mass increases decreases remains the same
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 come to an abrupt stop at Earth's center speed up until it gets to Earth's center speed up until it reaches Earth's other side slow down until it reaches Earth's center
speed up until it gets to Earth's center
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 Moon the melon both about equally
the melon
If you bounce up and down on a bathroom scale, what varies on the scale reading is mg the normal force both neither
the normal force
Planets wobble in their orbits due to uncertainties in the inverse-square law. elliptical-orbit quirks. all of these the pull of other planets.
the pull of other planets.
A black hole is an empty region of space with a huge gravitational field at the center if all stars. the remains of a giant star that has undergone gravitational collapse
the remains of a giant star that has undergone gravitational collapse
One side of the Moon continually facing Earth is a passing phenomenon a cosmic coincidence tidal lock.
tidal lock.
An asteroid exerts a 360-N gravitational force on a nearby spacecraft. The 360-N force on the spacecraft is directed toward the asteroid. away from the asteroid toward the Sun
toward the asteroid.
Tidal forces in general are the result of two or more sources of gravitation a combination of any kind of forces acting on a body unequal forces acting on different parts of a body the inverse-square law
unequal forces acting on different parts of a body
In comparison with other fundamental forces, the universal gravitational constant G indicates that gravity is very weak strong very strong
very weak
Inside a freely-falling elevator, you would have no gravitational force on you weight both of these neither of these
weight
Inside a freely-falling runaway elevator, your acceleration is zero. weight is zero gravitational interaction with Earth is zero. all of the above
weight is zero
The Earth is closer to the Sun in January than in July, which accounts for the fact that the highest high tides in the Northern Hemisphere occur in winter spring summer fall
winter
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 beyond the main pull of Earth's gravity above Earth's atmosphere without support forces all of the above
without support forces
Your weight is the force due to gravity only. you exert against a supporting surface. equal to your normal force on any surface.
you exert against a supporting surface.
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 - the Sun's pull on you is negligibly small - the weighing scale is calibrated only in Earth weight - you, the scale, and Earth are in free fall (in orbit) around the Sun - the Sun's pull is cancelled by the gravitation of other celestial bodies
you, the scale, and Earth are in free fall (in orbit) around the Sun