8th Science 2-4 Gravity

Two objects have a certain gravitational force between them. What would happen if the mass of one of the objects suddenly increased?

• The mass of the other object would increase

• The distance between the objects would increase

• The gravitational force of the objects would remain constant

• The gravitational force between the two objects would increase.

Each of the pairs of objects listed are the same distance apart. Which pairs of objects has the largest gravitational force?

• marble and car

• marble and baseball

• car and bowling ball

• There is no gravitational force between any of these pairs of objects

Which statement describes the force between a satellite and Earth if Earth

• The force would be two times what it is now

• The force would be four times what it is now

• The force would be one-half what it is now

• The force would be one-fourth what it is now.

Two basketballs are sitting 1m apart and are not moving. Which best explains why the gravitational force does not cause them to move?

• No gravitational force exists between the two objects because they are not touching.

• The gravitational force between the two objects is weak because they are 1m apart.

• No gravitational force exists between the two objects because their masses are small.

• The gravitational force between the two objects is weak because their masses are too small.

If someone drops a cup, it falls to the ground. Why doesn't the gravitational force between the person's hand and the cup keep the cup from falling?

• The cup foes not experience any gravitational force because it is not a planet

• The gravitational force between the hand and the cup is so strong that it pushes the cup down.

• There is no gravitational force between the hand and the cup, so Earth's gravitational force pulls the cup up.

• There is a gravitational force between the hand and the cup, but Earth's gravity is stronger, so Earth's gravity pulls the cup down.

Which statement about a black hole describes why objects experience such a strong gravitational pull near a black hole?

• It has an extremely large mass and is much larger than the sun

• It has an extremely small mass and is much smaller than the sun

• It has an extremely large mass but is much smaller than the sun

• It has an extremely small mass but is much larger than the sun

A comet is orbiting the sun. How does the sun's gravitational force affect the comet during its orbit?

• It causes a continuous increase in the speed of the comet

• It causes a continuous decrease in the speed of the comet

• It causes the comet's speed to remain constant throughout its orbit

• It causes the comet's speed to increase and decrease throughout its orbit.

______ is the force of attraction between objects due to their masses.

Gravity is always a _______ force.

• attractive

• repulsive

• neutral

• balanced

The amount of matter in an object

• mass

• weight

• newtons