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Motion and Vectors

Total questions: 45

Worksheet time: 2hrs 30mins

Name
Class
Date
1.
The result of adding two vectors together is called the?
a)
independent vector
b)
resultant vector
c)
directional vector
d)
manipulated vector
2.
At the instant a ball is thrown horizontally, an identical ball is dropped from the same height. Which ball hits the ground first? (no air resistance)
a)
the horizontally thrown ball
b)
they both hit the ground at the same time
c)
the dropped ball
3.
The diagram represents the path of a car that is driven off a cliff. Neglecting air resistance, the horizontal component of the velocity at A is _______ the horizontal component of the velocity at B
a)
smaller than
b)
greater than
c)
the same as
d)
can not be determined
4.
According to the picture, which points is the speed of the projectile the same?
a)
B and E
b)
A and E
c)
B and D
d)
Both A and E, B and D
5.
In the absence of air resistance, the angle at which a thrown ball will go the farthest is?
a)
60 degrees
b)
45 degrees
c)
15 degrees
d)
30 degrees
6.
The cannon fires at 45 degrees with a set velocity. If the angle of the projectile is raised to 75 degrees, what would happen to the height and range of the projectile's path?
a)
The projectile would travel to a greater height and have a longer range.
b)
The projectile would travel to a lower height and have a smaller range.
c)
The projectile would travel to a greater height and have a smaller range.
d)
The projectile would travel to a greater height and have the same range.
7.
A ball is thrown straight upward at 20 m/s. With no air resistance, the ball will return to the thrower's hand with a speed of?
a)
20 m/s
b)
40 m/s
c)
80 m/s
d)
0 m/s
8.
The picture shows two objects that were dropped and recorded with a stroboscopic camera. The best explanation for the results is that object A
a)
has less air resistance
b)
was dropped from a greater height
c)
has a smaller mass
d)
accelerated more slowly
9.
Which of the following is a physical quantity that has a magnitude but no direction?
a)
Vector
b)
Scalar
c)
Resultant
d)
Frame of Reference
10.
Identify the following quantities as scalar or vector: the mass of an object, the number of hairs on a dog, an airplane's velocity.
a)
Vector, Scalar, Scalar
b)
Scalar, Scalar, Vector
c)
Vector, Scalar, Scalar
d)
Scalar, Vector, Vector
11.
Identify the following quantities as scalar or vector: the speed of a cat, the time it takes to run a marathon, the free-fall acceleration.
a)
Vector, Scalar, Scalar
b)
Scalar, Scalar, Vector
c)
Vector, Scalar, Scalar
d)
Scalar, Vector, Vector
12.
Which of the following is the best coordinate system to analyze a car traveling northeast from one city to another?
a)
Positive x-axis pointing east; positive y-axis pointing south
b)
Positive x-axis pointing west; positive y-axis pointing east
c)
Positive x-axis pointing north; positive y-axis pointing south
d)
Positive x-axis pointing east; positive y-axis pointing north
13.
What is the path of a projectile?
a)
Wavy line
b)
Parabola
c)
Hyperbola
d)
Projectiles don't follow a predictable path.
14.
Which of the following exhibits parabolic motion?
a)
A person diving into a pool from a diving board
b)
A space shuttle orbiting Earth at a constant velocity
c)
A leaf falling from a tree
d)
A train moving along a flat track
15.
Which of the following does NOT exhibit parabolic motion?
a)
A frog jumping from land into water
b)
A basketball thrown towards a hoop
c)
A flat piece of paper released from a window
d)
A baseball thrown to home plate
16.
When representing velocity as a vector...
a)
the directino of the arrow shows the direction of motion
b)
the length represents speed
c)
the length of the arrow is drawn to a suitable scale
d)
all of these
17.
Which of the following would NOT be considered a projectile? 
a)
a cannonball thrown straight up
b)
a cannon ball rolling down a slope
c)
a cannonball rolling off a table
d)
a cannonball thrown in the air
18.
The horizontal component of a projectile's velocity is independent of...
a)
it's range
b)
time
c)
the vertical component
d)
none of these
19.
In the absence of air friction, the vertical component of a projectile's velocity doesn't change as the projectile moves. 
a)
True
b)
False
c)
Sometimes true
d)
Sometimes false
20.
In the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves. 
a)
True
b)
False
c)
Sometimes true
d)
Sometimes false
21.
A ball is thrown into the air at some angle. At the very top of the ball's path, its velocity is
a)
entirely vertical
b)
both vertical and horizontal
c)
entirely horizontal
d)
not enough info
22.
In the absence of air resistance, the angle at which a thrown ball will do the farthest is
a)
15o
b)
300
c)
45o
d)
600
23.
At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first? 
a)
Neither- they hit at the same time
b)
the horizontally thrown ball
c)
the dropped ball
d)
None of these
24.
T/F The vector sum is the resultant. 
a)
True
b)
False
25.
T/F The length of the vector represents magnitude. 
a)
True
b)
False
26.
T/F The orientation of a vector shows the direction. 
a)
True
b)
False
27.
T/F Mass is a vector quantity. 
a)
True
b)
False
28.

As the angle between this vector

and the horizontal axis is increased

from 15 to 90 degrees, what happens

to the magnitude of its vertical component?

a)

Increases

b)

Decreases

c)

Stays the Same

29.

Find the magnitude and direction of the

equilibrant for the following system of forces.

(Remember the equilibrant is the force that brings the system into equilibrium)

a)

20 N northeast

b)

20 N southwest

c)

28.28 N northeast

d)

28.28 N southwest

30.

The picture shows three horizontally launched projectiles. All of the objects are launched from the same height at the same time but with different velocities. Which horizontally launched projectile lands first?

a)

The projectile which is launched at speed v1

b)

The projectile which is launched at speed v2

c)

The projectile which is launched at speed v3

d)

All three projectiles land at the same time

31.

A lucky penny is tossed horizontally

with a velocity of 15 m/s from a

height of 100. m above the ground.

How long will it take the penny to hit

the ground?

a)

1.5 s

b)

2.5 s

c)

4.5 s

d)

20.5 s

32.

A cannon ball is launched horizontally off a cliff with a velocity of 4 m/s. The cliff is 20 m high. Approximately how far from the base of the cliff, does the cannon ball land?

a)

2 m

b)

4 m

c)

6 m

d)

8 m

33.

At what angle from the horizontal

must a projectile be launched in

order to achieve the greatest range?

a)

30 degrees

b)

45 degrees

c)

60 degrees

d)

90 degrees

34.

At what angle from the horizontal

must a projectile be launched in

order to achieve the maximum

flight time?

a)

30 degrees

b)

45 degrees

c)

60 degrees

d)

90 degrees

35.

How does the maximum altitude and

horizontal distance of a projectile change as the launch angle is increased from 30 to 45

degrees?

a)

Both the horizontal distance traveled and the maximum altitude reached will increase

b)

Both the horizontal distance traveled and the maximum altitude will decrease

c)

The projectile will travel a greater horizontal distance but the maximum altitude it reaches will decrease

d)

The projectile will travel a shorter horizontal distance but the maximum altitude it reaches will increase

36.

A stone is thrown at an angle and travels as shown in the picture. Assuming there is no air resistance, which of the following statements regarding the projectile is true?

a)

The stone's vertical velocity is constant

b)

The stone's vertical velocity increases as it rises and decreases as it falls

c)

The stone's horizontal velocity is constant

d)

The stone's horizontal velocity decreases as it rises and increases as it falls

37.
What is the path of a projectile?
a)
Wavy line
b)
Parabola
c)
Hyperbola
d)
Projectiles don't follow a predictable path.
38.

A quantity that shows only magnitude is a ___________ quantity

a)

vector

b)

resultant

c)

scalar

d)

directional

39.

When vectors are parallel but in opposite directions how are they combined?

a)

Add them

b)

Subtract them

c)

Use the Pythagorean theorem

d)

Take the square root

40.

In the figure above, which diagram represents the vector addition C = A + B?

a)

I

b)

II

c)

III

d)

IV

41.

What vector gives the sum of these two vectors?

a)
b)
c)
d)
e)
42.
A car travels 90 meters due north in 15 seconds. Then the car turns around and travels 40 meters due south.  What is the magnitude and direction  of the car's resultant displacement?  
a)
40 metres, South
b)
50 metres, South
c)
50 metres, North
d)
40 metres, North 
43.
In practice A of the figure, what is the direction of the resultant displacement?
a)
63 degrees, South of East
b)
63 degrees, North of West
c)
27 degrees, North of West
d)
27 degrees, South of West
44.
If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement?
a)
20m
b)
40m
c)
0m
d)
-20m
45.

10 mph

a)

scalar

b)

vector

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