Physics chapter 13 practice

unequal forces acting on different parts of a body

Tidal forces in general are the result of

increases

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 to four times as much

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

the moon

Which is most responsible for the ocean tides?

moon has a sufficient tangential speed

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

apparent weight is zero

Inside a freely-falling runaway elevator, your

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

A black hole is

buy at a high altitude and sell at a low altitude

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

Both forces are the same

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?

100 N

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?

divides by 4 the gravitational force between them

According to Newton, doubling the distance between two interacting objects

greater the gravitational force between them

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

40 N

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

always false

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

Forget it; you can't travel far enough

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

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

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

decrease to one half your original weight

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

increase also

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

increase

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

the same

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

not change

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

quadruple

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

apparent weight for you

Inside a freely-falling elevator, there would be no

are in free fall and experience apparent weightlessness

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

stay the same

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

both inside and outside the Earth and throughout the entire universe

The Earth's gravitational field extends

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

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

in the same direction as the gravitational attraction

The direction of a gravitational field is

surface escape velocity

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

stand on a planet with a radius that is shrinking

The force of gravity acting on you will increase if you

practically the same weight

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

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

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

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

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

toward the asteroid

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

Earth

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

that gravity is universal

Newton discovered

500 N

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

remains the same

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

you, the scale, and the Earth are freely falling around the sun

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