Chapter 9

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

10 N

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

decrease

When the distance between two stars decreases by one-third, the force between them

increases to nine times as much

One side of the Moon continually facing Earth is

tidal lock

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

6.67x10-11N

Which is most responsible for Earth's ocean tides?

Moon

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

The force decreases to 1/4 of its inital value.

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

increases

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?

both forces are the same

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

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

greater the gracitational force between them

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

increase also

The main reason ocean tides exist is that Moon's pull is stronger

on water closer to it than on water farther away.

The force of Earth's gravity on a capsule in space will lessen as it moves father away. If the capsule moves to twice its distance, the force toward Earth becomes

one-forth

According to Newton, when the distance between tow interacting objects doubles, the gravitational force is.

one-quarter

Tidal forces in general are the result of

unequal forces acting on different parts of a body