AnswersPhysicsCircular Motion and Gravitation

Practice Test Answers

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1
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In the equation for the gravitational force between two objects, what does cap g represent?

A
the gravitational acceleration
B
the gravitational force
C
the gravitational constant
D
the gravitational field strength
2
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According to Newton’s universal law of gravitation, which would change the path of the ball so it traces out the widest curved path possible? Cecelia dropped a ball from a height of 2 m The ball fell in a straight path down to the ground.

A
tossing it horizontally at a slower speed
B
dropping it from a shorter distance
C
tossing it horizontally at a faster speed
D
dropping it from a greater distance
3

Which statement is supported by Kepler’s laws?

A
As a planet moves away from the Sun, its gravitational force remains the same.
B
As a planet moves away from the Sun, its gravitational force increases.
C
The closer a planet is to the Sun, the faster it moves.
D
The farther a planet is from the Sun, the faster it moves.
4

He wants to throw the pitch level with the ground and in the direction he is facing. At which point should he release the pitch?

A
W
B
X
C
Y
D
Z
5

What change should Rahul make?

A
He should change the direction of the vectors that are tangent to the circle so that each points toward the center of the circle.
B
He should change the length of each vector that points toward the center so that it is the same length as the vector pointing tangent to the circle at that point.
C
He should change the direction of the vectors that are tangent to the circle so that each points away from the center of the circle.
D
He should change the lengths of the vectors that point tangent to the circle so that each is the same length.
6

To the nearest whole number, how much would a 25 point 0 kilograms rock weigh on Uranus?

A
430 cap n
B
532 cap n
C
170 cap n
D
218 cap n
7

How far from the center of the ride is the child?

A
0 point 3 6 m
B
0 point 0 8 5 m
C
0 point 2 7 m
D
0 point 0 6 8 m
8

Which best explains how to correct Leo’s diagram?

A
change the vector labeled cap f sub A i r so it is labeled cap f sub p
B
make the cap f sub g vector longer
C
remove the cap f sub A i r vector
D
add an cap f sub p vector at the center and pointing left
9

Which conclusion is best supported by the image?

A
The time needed to travel from W to X is greater than the time needed to travel from Y to Z.
B
The gravitational force at W is less than the gravitational force at Y.
C
The gravitational force at W is the same as the gravitational force at Y.
D
The time needed to travel from W to X is the same as the time needed to travel from Y to Z.
10

Which object is most likely represented by the dot?

A
a car driving over the top of a hill
B
a bug on the top of a rolling hula hoop
C
a roller coaster car at the top of a vertical loop of track
D
a ball on a string that stopped at the top of a vertical loop

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