Gravity Answers

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1
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Why are objects that fall near Earth’s surface rarely in free fall?

A
Gravity does not act on objects near Earth’s surface.
B
Air exerts forces on falling objects near Earth’s surface.
C
The objects do not reach terminal velocity.
D
The objects can be pushed upward by gravity.
2
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Which change will always result in an increase in the gravitational force between two objects?

A
increasing the masses of the objects and increasing the distance between the objects
B
decreasing the masses of the objects and decreasing the distance between the objects
C
increasing the masses of the objects and decreasing the distance between the objects
D
decreasing the masses of the objects and increasing the distance between the objects
4

What units are used to measure mass and weight?

A
Mass and weight are measured in kilograms.
B
Mass and weight are measured in newtons.
C
Mass is measured in kilograms, and weight is measured in newtons.
D
Mass is measured in newtons, and weight is measured in kilograms.
5

When does a skydiver achieve terminal velocity?

A
when gravity equals air resistance
B
when gravity is greater than air resistance
C
when air resistance acts on the diver and gravity does not
D
when gravity acts on the diver and air resistance does not
6

What determines the path that an object in projectile motion follows? (Ignore air resistance)

A
gravity only
B
inertia only
C
gravity and inertia
D
neither gravity or inertia
7

A ball is thrown forward at 5 m/s.

A
The ball would follow a curved path on Earth but a straight path on the moon.
B
The ball would follow the same curved path on Earth as on the moon.
C
The ball would curve down more sharply on Earth than on the moon.
D
The ball would curve down on Earth but curve up on the moon.
9

Which describes an object in projectile motion?

A
Gravity acts to push the object sideways.
B
The object moves in a straight path.
C
The forward velocity of the object is 0 m/s.
D
The object’s inertia carries it forward.
10

Increasing which factor will cause the gravitational force between two objects to decrease?

A
weights of the objects
B
distance between the objects
C
acceleration of the objects
D
masses of the objects

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