AnswersPhysics IProjectile Motion

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Rosa uses the formula open paren v sub i cosine theta close paren times triangle times t to do a calculation. Which value is Rosa most likely trying to find?

A
the horizontal displacement of a projectile launched horizontally
B
the vertical acceleration of a projectile launched horizontally
C
the vertical acceleration of a projectile launched at an angle
D
the horizontal displacement of a projectile launched at an angle
2
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Why is a baseball thrown by a pitcher considered to have projectile motion?

A
It gets pulled to the ground by gravity.
B
It moves in a diagonal direction.
C
It has horizontal and vertical motion.
D
It gains a lot of kinetic energy.
3

Lexy throws a dart with an initial velocity of 25 m/s at an angle of 60 degrees relative to the ground. What is the approximate vertical component of the initial velocity?

A
21 point 7 m/s
B
0 point 8 7 m/s
C
0 point 5 m/s
D
12 point 5 m/s
4

Which formula can be used to calculate the horizontal displacement of a horizontally launched projectile?

A
triangle x is equal to v sub i times cosine theta
B
triangle x is equal to A sub y triangle t
C
triangle x is equal to v sub i sine theta triangle t
D
triangle x is equal to v sub x triangle t
5

Which is an example of projectile motion?

A
an athlete running on a track
B
a teacher picking up a pencil
C
a person throwing a rock
D
a child swinging on a swing set
6

Barry is conducting an experiment and rolls a tennis ball down a ramp. Which best describes the motion of the tennis ball?

A
It does not exhibit projectile motion and follows a straight path down the ramp.
B
It exhibits projectile motion and follows a straight path down the ramp.
C
It exhibits projectile motion and follows a parabolic path down the ramp.
D
It does not exhibit projectile motion and follows a parabolic path down the ramp.
7

Which arrow best represents the path of an object with projectile motion?

A
Image with description A ladder in the middle with a vector pointing west.
B
Image with description A curve arrow above 'C' emerging from the left and its arrow head on the right
C
Image with description A vector drawn northeast, labeled D.
D
Image with description A vector drawn north, labeled B.
8

Question text not available

Answer:

parabolic

9

Charlotte throws a paper airplane into the air, and it lands on the ground. Which best explains why this is an example of projectile motion?

A
A push and a pull are the primary forces acting on the paper airplane.
B
The paper airplane’s motion is due to horizontal inertia and the vertical pull of gravity.
C
The paper airplane’s motion can be described using only one dimension.
D
A force other than gravity is acting on the paper airplane.
10

In the formula v sub y is equal to A sub y triangle t , what is the value of A sub y for an object in projectile motion?

A
negative 9 point 8 m/s squared
B
1 point 0 m/s squared
C
1 half m/s squared
D
0 m/s squared

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