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Conceptual Physics Final Exam (Fall 2020)

Total questions: 75

Worksheet time: 2hrs 30mins

Name
Class
Date
1.
In an appropriately designed experiment, a scientist is able to test the effect of
a)
 a single variable
b)
 multiple variables
c)
 the hypothesis
d)
 scientific observations
2.
Mr. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the independent variable.
a)
Distance traveled by the ball
b)
Height of the ramp
c)
Mass of the ball
3.
A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. The dependent variable is the _____.
a)
Diameter of the ball
b)
Force acting on the ball
c)
Height that the ball bounces
d)
Height from which the ball is dropped
4.
The independent variable is the ONE thing you _____.
a)
change
b)
keep the same
c)
experiment with
d)
investigate
5.

Mr. McNiece wanted to see how different types of music affected students' pulse rates. She played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. What constant or control should be considered when doing this experiment?

a)

types of music

b)

use all dead people

c)

using a different student for each music type

d)

amount of time the music was played

6.

True or False: Is the object in mechanical Equilibrium?

a)

True

b)

False

7.
Equilibrium means _________
a)
being at rest
b)
traveling at light speed
c)
balance
d)
pushing or pulling
8.
A vector means there is __________ and __________
a)
speed and velocity
b)
tension and weight
c)
balance and tauntness
d)
magnitude and direction
9.
What does this mean?
a)
sum of forces equals zero
b)
everyone forget physics
c)
Billy and Bob will be falling 140 ft and 110 ft respectfully
d)
Billy and Bob's effective faith in their balance is zero
10.

The equilibrium rule, ∑F = 0, applies to…

a. Objects at rest.

b. Objects moving with a constant speed in a straight line.

c. Both (a) and (b).

d. Neither (a) nor (b)

a)

a

b)

b

c)

c

d)

d

11.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
12.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
zero net force
c)
balanced forces
d)
unbalanced forces
13.
What is the name for a push or pull?
a)
A movement
b)
A force
c)
Speed
d)
Density
14.
What is Newton's First Law
a)
F=ma
b)
Every action has an equal and opposite reaction
c)
An object at rest stays at rest, an object in motion stays in motion. 
d)
Friction 
15.
friction is a force that acts 
a)
in the same direction as the motion
b)
opposite to the direction of the motion
c)
opposite to the applied forces
d)
the same direction as the applied force
16.

What is Newton's 2nd Law?

a)

Every action has an equal and opposite reaction

b)

An object at rest stays at rest, an object in motion stays in motion.

c)

F = ma

d)

Friction

17.

Your car has a mass of 2500 kg and a force of 5000 N. How fast will it accelerate?

a)

20 m/s2

b)

0.5 m/s2

c)

2 m/s2

d)

120 N

18.

Find how much force the man will need to exert to move the car.

a)

5000 N

b)

50 N

c)

20,000 N

d)

500 N

19.

If the man pushes with an equal amount of force, which object will accelerate more?

a)

Car because it has more mass

b)

Lawnmower because it has less mass

c)

Car because it has less mass

d)

Lawnmower because it has more mass

20.

A 25 kg bike accelerates at 10 m/s2. What was the force?

a)

250 N

b)

2.5 N

c)

25 N

d)

15 N

21.

Newton’s law states that for every action, there is an ________ reaction.

a)

unequal and opposite

b)

equal and similar

c)

stronger and opposite

d)

equal and opposite

22.

When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

a)

The cannon moving forward

b)

The cannon moving backwards

c)

The cannonball moving backwards

d)

The cannonball moving forward

23.

Force always come in________

a)

waves

b)

triplets

c)

pairs

24.
Why is the net force 0 in the image?
a)
Because the elephants are the same size
b)
Because they are both pulling the same amount of force in opposite directions
c)
Because they are elephants
d)
Because they are pulling away from each other.
25.

The two paired forces in Newton's third law:

a)

act on different objects

b)

are equal in size

c)

are opposite in direction

d)

are the same type

e)

all of the above

26.

 Δv=a×t\Delta v=a\times t  

A ball is thrown straight up in the air and then falls back to Earth. If the downward fall takes 2.2 seconds, how fast is the ball traveling when it strikes the ground (HINT: acceleration due to gravity on Earth is 9.8 m/s2).

a)

21.6 m/s

b)

21.6 m/s2

c)

-4.5 m/s

d)

4.5 m/s

27.

 t=Δvat=\frac{\Delta v}{a}  

A train travels at a constant acceleration of 6 m/s2, starting from standstill at a station and traveling along a straight track. How long does it take the train to reach 72 m/s?

a)

12 s

b)

12 m/s

c)

432 s

d)

432 m/s2

28.

 a=Δvta=\frac{\Delta v}{t}  

A car traveling at a speed of 25 m/s increases its speed to 30.0 m/s in 10 seconds. What is the magnitude of its acceleration?

a)

0.5 m/s2

b)

-0.5 m/s2

c)

-5.5 m/s2

d)

2 m/s2

29.
What is the velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s2)?. 
a)
10, 20, 30, 40, 50 m/s
b)
5, 10, 15, 20, 25 m/s
c)
5, 20, 45, 80,125 m
d)
10,10,10,10,10 m/s
30.

What is the velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s2)?. V = g X t

a)

10, 20, 30, 40, 50 m/s

b)

5, 10, 15, 20, 25 m/s

c)

5, 20, 45, 80,125 m

d)

10,10,10,10,10 m/s

31.

Bullet fired vs Bullet dropped: which lands first

a)

bullet fired

b)

bullet dropped

c)

both at same time

32.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
33.
A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision.  What is the velocity of the second ball after the collision? 
a)
5 m/s
b)
2.5 m/s
c)
10 m/s
d)
7.5 m/s
34.

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.

Calculate the impulse on the ball. Impulse = F x t

a)

1 N*s

b)

6 N*s

c)

33.3 N*s

d)

None of these

35.

An object has a mass of 5 kg, a displacement of 5 m, and a time of 25 s, what is its momentum? p = m x v ; v = d/t

a)

1 kgm/s

b)

750 kgm/s

c)

25 kgm/s

d)

625 kgm/s

36.

At what point does the biker have the greatest Kinetic Energy?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

37.

At what point does the biker have the greatest Potential Energy?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

38.

It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules? work = Force x distance

a)

200 J

b)

20.0 J

c)

100 J

d)

10 J

39.

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level. P.E. = m x g x h ; g = 9.8 m/s2

a)

250,000 J

b)

2,450,000 J

c)

2,451,663 J

d)

248 J

40.

How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s? K.E. = 1/2 m x v2

a)

27 J

b)

18 J

c)

9 J

d)

2 J

41.

The statement that "the energy within a system remains constant and cannot be created or destroyed, only transformed" best sums up _________.

a)

Something Mr. Walker likes to say.

b)

Life

c)

Law of Conservation of Energy

d)

The scientific method

e)

Newton's Third Law

42.
Is the amount of energy being transferred over a period of time.
a)
Power
b)
Energy
c)
Seconds
d)
Joules
43.
What is the unit of measurement for power?
a)
Joules
b)
Watts
c)
Voltage
d)
Calories
44.

A kettle transfers 1000J of energy every 2 seconds. Calculate its power. Power = work / time

a)

2000 Watts

b)

1000 Watts

c)

500 Watts

d)

cannot be determined

45.

Centripetal force is an acceleration of an object moving in circular path whose direction is _________________________of the circular path and whose magnitude is equal to the square of the speed divided by the radius.

a)

towards the tangent

b)

towards the centre

c)

towards the minimum point

d)

towards the maximum point

46.
The velocity is always _____ to the line of a circle. 
a)
outwards
b)
towards the center
c)
tangent
d)
faster
47.
Which represents the acceleration of the ball?
a)
A
b)
B
c)
C
d)
D
48.
Which of the following depict the speed of the blowing ball?
a)
A
b)
B
c)
C
d)
D
49.

If an object is spinning around on a string and the string was suddenly cut, the object would move in a

a)

curved path

b)

straight line

50.
As mass increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
51.
As the distance between 2 objects increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
52.
The number 6.67 x 10 -11 N* m^2 / kg^2 is called the _______________.
a)
universal speed constant
b)
the speed force
c)
universal gravitational constant
d)
Earth's gravitational constant
53.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass
54.

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m. Fc = m x v2 / r

a)

10 N

b)

20 N

c)

30 N

d)

40 N

55.

the process or act of turning or circling around something

a)

Curvature

b)

Rotation

c)

Radius

d)

Orbit

56.
What is light?
a)
A form of energy
b)
A form of sound
c)
bright stuff
d)
A form of excitement
57.
Which material is NOT translucent?
a)
Brick
b)
Tissue paper
c)
Thin sheet of plastic
58.
Which material is opaque?
a)
Brick
b)
Water
c)
Tissue Paper
d)
Glass
59.
Which one is an example of light being reflected?
a)
Seeing yourself in a mirror
b)
Lighting a candle
60.
The light we can see. 
a)
visible
b)
gamma
c)
ultraviolet
61.
Makes you get sunburn. 
a)
x-ray
b)
visible
c)
ultraviolet
62.
Shows all light from the sun and stars. 
a)
Electromagnetic Spectrum
b)
Camera
c)
Eyes
63.
What means number of waves per second?
a)
wavelength
b)
reflection
c)
diffraction
d)
frequency
64.
Which type of waves are used in broadcasting?
a)
radio waves
b)
infrared rays
c)
x-rays
65.
Which has the SHORTEST wavelength and, therefore, the highest frequency/most energy
a)
Radio waves
b)
Ultraviolet Rays
c)
Gamma Rays
d)
X-rays
66.
Which has the LONGEST wavelength and, therefore, the lowest frequency/energy
a)
Gamma Rays
b)
Radio Waves
c)
Visible Light
d)
Infrared rays
67.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
68.
This large crane magnet functions only when the electrical current is ON.  The crane magnet is an example of what type of magnet?
a)
NIB Magnet
b)
Ceramic Magnet
c)
Electromagnet
d)
funnel magnet
69.
How is Earth's magnetic field similar to that of a magnet?
a)
It is hundreds of miles long
b)
It has north and south poles
c)
It is made in Earth's core
d)
It is shaped like a horseshoe
70.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
71.
Magnetism is generated by moving
a)
protons.
b)
electrons.
c)
neutrons.
d)
elements.
72.
If you place the North pole of a magnet next to the South pole of another magnet, they will:
a)
Attract
b)
Repel
c)
Do nothing
d)
Shatter
73.
A simple electromagnet can be made with which of the following?
a)
an electric current
b)
a turbine and nail
c)
a nail, a wire, and a battery
d)
a compass and a battery
74.
Why is Earth's magnetic field important?
a)
So Santa has a home
b)
To protect from solar winds
c)
To attract magnetic particles from space
d)
To keep Earth rotating correctly 
75.

The auroras are created when particles from the ________ crash into and mix with gases in Earth's upper atmosphere.

a)

Sun

b)

Moon

c)

Meteors

d)

Clouds

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