Physics chapter 13 practice

The planet Jupiter is about 300 times as massive as Earth, yet on its surface you would weigh only about 3 times as much. This is because

Jupiter's radius is 10 times the Earth's radius

The Earth's gravitational field extends

both inside and outside the Earth and throughout the entire universe

A supplier wants to make a profit by buying metal by weight at one altitude and selling it at the same price per pound at another altitude. The supplier should

buy at a high altitude and sell at a low altitude

If the Earth's mass decreased to one-half its original mass with no change in radius, then your weight would

decrease to one half your original weight

According to Newton, doubling the distance between two interacting objects

divides by 4 the gravitational force between them

Tidal forces in general are the result of

unequal forces acting on different parts of a body

An asteroid exerts a 360-N gravitational 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

40 N

A very massive object A and a less massive object B move toward each other under the influence of gravitation. Which force, if either, is greater?

Both forces are the same

An object is placed exactly halfway between the Earth and moon. The object will fall toward the

Earth

Newton discovered

that gravity is universal

A weight watcher who normally weighs 400 N stands on top of a very tall ladder so she is one Earth radius above the Earth's surface. How much would she weigh there?

100 N

What is the force of gravity on a 500-newton woman standing on the Earth's surface?

500 N

How far must one travel to get away from the Earth's gravitational field?

Forget it; you can't travel far enough

The amount of gravitational force that acts on the space shuttle while in orbit is

almost as much as the shuttle's weight on the Earth's surface

For the astronauts inside the orbiting space shuttle, there is no force of Earth gravity acting on them. This statement is

always false

Inside a freely-falling elevator, there would be no

apparent weight for you

Inside a freely-falling runaway elevator, your

apparent weight is zero

Passengers in a high-flying jumbo jet feel their normal weight in flight, while passengers in the orbiting space shuttle do not. This is because passengers in the space shuttle are

are in free fall and experience apparent weightlessness

If a block is set sliding on a huge frictionless plane in contact with the Earth, it will NOT continue to move at constant speed because

gravity will pull in a non-perpendicular direction as the block gets farther out on the plane

According to Newton, the greater the masses of interacting objects, the

greater the gravitational force between them

The direction of a gravitational field is

in the same direction as the gravitational attraction

If the radius of the Earth somehow decreased with no change in mass, your weight would

increase

If the mass of the Earth somehow increased with no change in radius, your weight would

increase also

Two objects move toward each other because of gravity. As the objects get closer and closer, the acceleration of each

increases

Two objects move toward each other because of gravity. As the objects get closer and closer, the force between them

increases

When the distance between two stars decreases by half, the force between them

increases to four times as much

The main reason ocean tides exist is that the pull of the moon

is greater on oceans closer to the moon and less on oceans farther from the moon

The reason the moon does not crash into the Earth is that the

moon has a sufficient tangential speed

If the sun somehow became twice as massive, your weight as normally measured here on earth would

not change

The force of gravity acts on all apples on an apple tree. Some apples are twice as far from the ground as others. These twice-as-high apples, for the same mass, have

practically the same weight

If your mass, the mass of the 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

When a star collapses to form a black hole, its mass

remains the same

A black hole is

simply the remains of a giant star that has undergone gravitational collapse

The force of gravity acting on you will increase if you

stand on a planet with a radius that is shrinking

The Earth is currently accelerating toward the sun (centripetal acceleration). If the sun collapsed into a black hole, this acceleration would

stay the same

The factor most directly responsible for making a black hole invisible is its

surface escape velocity

Which is most responsible for the ocean tides?

the moon

If the sun collapsed to a black hole, the Earth's gravitational attraction to it would be

the same

An asteroid exerts a 360-N gravitational force on a nearby spacecraft. This force is directed

toward the asteroid

When you step on a weighing scale at noon, the Earth pulls you down 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 the Earth are freely falling around the sun