Gravitation and Size

If I double the distance between two objects, what happens to their gravitational Force?

• 4x bigger
• 4x smaller
• 2x bigger
• 2x smaller

If I double the mass of one object, but don't change anything else... What happens to the gravitational force between two objects?

• Doubles

• Quadruples

• Cut in Half

• 4x Smaller

What happens to Gravitational force if I triple both of the masses but don't change their distance?

• triples

• a third as big

• 9x bigger

• 9x smaller

What happens to Gravitational force if I triple one of the masses and quadruple the other but keep them at the same distance?

• 7x bigger

• 12x bigger

• 81x bigger

Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now 9 times as far from each other as before. Which of the following represents the gravitational force at this distance?

• F/3

• F/9

• F/81

• F/4.5

Two objects are attracted to each other with 125 N of gravitational force.

What would the force between them be if the distance between them were 5x bigger?

• 5 N

• 25 N

• 100 N

• 3125 N

Two objects are attracted to each other with 1000 N of gravitational force.

What would the force between them be if the distance between them were 12x smaller?

• 6,000 N

• 36,000 N

• 12,000 N

• 144,000 N

Two objects are attracted to each other with 1000 N of gravitational force.

Assume one of the masses is replaced with one 4x smaller and the distance between the masses is 10x smaller. What is the new gravitational force?

• 2,500 N

• 25,000 N

• 2.5 N

• 6,250 N

Planet Z has about 500 times the mass of Earth and about 15 times Earth's radius. Estimate the size of g on the surface of Planet Z.

• 2.22 m/s^2

• 21.56 m/s^2

• 33.33 m/s^2

• 45.27

The law of universal gravitation is credited to whom?

• Einstein

• Galileo

• Copernicus

• Newton