AnswersPhysicsTwo-Dimensional Motion

Practice Test Answers

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1
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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
2
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How far from the center of the ride is the child?

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

What is the magnitude of the resultant vector?

A
10 meters
B
2500 meters
C
1200 meters
D
50 meters
4

Which best compares the vertical motion of the two balls?

A
Both balls have zero acceleration and have constant velocity.
B
Both balls are acted on by gravity and are accelerating downward.
C
Both balls have constant velocity and are acted on by gravity.
D
Both balls are pulled downward and have zero acceleration.
5

Which best explains how to correct Leo’s diagram?

A
add an cap f sub p vector at the center and pointing left
B
remove the cap f sub A i r vector
C
change the vector labeled cap f sub A i r so it is labeled cap f sub p
D
make the cap f sub g vector longer
6

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

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

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

A
the gravitational field strength
B
the gravitational acceleration
C
the gravitational force
D
the gravitational constant
8

A car drives 16 miles south and then 12 miles west. What is the magnitude of the car’s displacement?

A
4 miles
B
28 miles
C
20 miles
D
16 miles
9

What is the vertical acceleration of a dart that is launched horizontally with an initial velocity of 2 point 3 m/s ?

A
9 point 8 m/s squared
B
2 point 3 m/s squared
C
negative 9 point 8 m/s squared
D
0 m/s squared
10

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
dropping it from a shorter distance
B
tossing it horizontally at a faster speed
C
tossing it horizontally at a slower speed
D
dropping it from a greater distance
11

Which statement is supported by Kepler’s laws?

A
The closer a planet is to the Sun, the faster it moves.
B
As a planet moves away from the Sun, its gravitational force remains the same.
C
The farther a planet is from the Sun, the faster it moves.
D
As a planet moves away from the Sun, its gravitational force increases.
12

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 lengths of the vectors that point tangent to the circle so that each is the same length.
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 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.
13

Which object is most likely represented by the dot?

A
a ball on a string that stopped at the top of a vertical loop
B
a bug on the top of a rolling hula hoop
C
a car driving over the top of a hill
D
a roller coaster car at the top of a vertical loop of track
14

Which conclusion is best supported by the image?

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

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