Gravity Answers
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Hector drew the diagram below to illustrate projectile motion.
H
He should switch the labels “Gravity” and “Inertia.”H
He should make the arrow for “Path” curve downward.H
He should switch the labels “Inertia” and “Path.”H
He should make the arrow for “Inertia” curve downward.2
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Why are objects that fall near Earth’s surface rarely in free fall?
G
Gravity does not act on objects near Earth’s surface.A
Air exerts forces on falling objects near Earth’s surface.T
The objects do not reach terminal velocity.T
The objects can be pushed upward by gravity.3
Increasing which factor will cause the gravitational force between two objects to decrease?
A
weights of the objectsB
distance between the objectsC
acceleration of the objectsD
masses of the objects4
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.5
What determines the path that an object in projectile motion follows? (Ignore air resistance)
A
gravity onlyB
inertia onlyC
gravity and inertiaD
neither gravity or inertia6
Which factors affect the gravitational force between two objects?
A
distance and velocityB
mass and distanceC
mass and weightD
acceleration and weight7
best
T
The heavier object has a greater acceleration.T
The object that has the greater surface area has the lower acceleration.T
The object that has the smaller mass has the greater acceleration.T
The objects have the same acceleration.8
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.9
What is the weight, on Earth, of a book with a mass of 1.5 kg?
A
1.5 NB
6.5 NC
11.3 ND
14.7 N10
What is the only force that can act on an object in free fall?
g
gravityf
frictiona
air resistances
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