chapter 9 1310 holtz

Which is most responsible for Earth's ocean tides?

moon

Is there change in the force of gravity between two objects when their masses are doubled and the distance between them is also doubled?

no

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

practically the same weight

Why is a black hole invisible?

the escape velocity of the black hole is greater than the speed of light

How does the force of gravity between two bodies change when the distance between them is doubled?

the force decreases to 1/4 of its initial value

On each given day and location, tides rise and fall at

different times

What is the magnitude of Earth's gravitational force on a 1-kg body at Earth's surface?

10 N

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

40 N

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

500 N

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

remains the same

Tides caused mainly by the Moon occur in Earth's

atmosphere, interior, oceans (all)

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

toward the asteroid

Which rocket would require more fuel?

one going from Earth to the Moon

If Earth's radius somehow increased with no change in mass, your weight would

decrease

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

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

F=Gm1m2/d2 Calculate the force of gravity on the 1-kg mass if it were 1.3×107m above Earth's surface (that is, if it were three Earth radii from Earth's center).

1.1N

Suppose you stood atop a ladder so tall that you were 4 times as far from Earth's center as you presently are. Find the change in your weight

16

Calculate the force of gravity between Earth (mass = 6.0×1024kg) and the Sun (mass = 2.0×1030kg ). The average Earth-Sun distance is 1.5×1011m .

3.6 x 10^22

What is the magnitude of the gravitational force between two 1-kg bodies that are 1 m apart?

6.67 x 10^-11

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

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

increase also

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

increases

What happens to the strength of the gravitational field at the surface of a star that shrinks?

it increases

If Earth shrank, but there was no change in its mass, then what would happen to your weight at the surface?

it would increase

A black hole is

the remains of a giant star that has undergone gravitational collapse

One side of the Moon continually facing Earth is

tidal lock

Tidal forces in general are the result of

unequal forces acting on different parts of a body