Newton discovered

• gravity

• that gravity is universal

• neither of these

• both of these

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

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

• half

• one quarter

• the same

• twice as much

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

• increase also

• decrease

• stay the same

• all of the above

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

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

• increase also

• decrease

• stay the same

• all of these

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

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

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

• increases

• decreases

• remains constant

To make a profit a buyer purchases metal by weight at one altitude and sells it at the same price per pound at another altitude. The supplier 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