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Physics First Semester Final Exam

Total questions: 95

Worksheet time: 2hrs 21mins

Name
Class
Date
1.

What is the unit for mass?

a)

kg

b)

N

c)

ms-2

d)

W

2.

What is the S.I. unit for time?

a)

century

b)

s

c)

N

d)

J

3.

What is the S.I. unit for distance?

a)

J

b)

m

c)

W

d)

s

4.

What is the unit for speed?

a)

N

b)

ms-1

c)

ms-2

d)

seconds

5.

What is the unit for force?

a)

Watt

b)

Newton

c)

kilogram

d)

Henry

6.

What is the unit for kinetic energy, Ek?

a)

Watt

b)

Joule

c)

Volt

d)

Newton

7.

What is the unit for work, w?

a)

Newton

b)

Torque

c)

Joule

d)

metres per second

8.

What is the unit for power, P?

a)

Watt

b)

Volt

c)

Ampere

d)

Joule

9.
The basic unit of metric volume is called a_____.
a)
Meter
b)
Gram
c)
Liter
d)
Metric
10.
5,000 m = _____ km
a)
50
50
b)
500
c)
5
d)
50,000
11.
80 mm = ____ cm 
a)
.8
b)
800
c)
8
d)
8,000
12.
15.5 m = _____ mm
a)
155 
b)
1,555
c)
1.55
d)
15,500
13.

Newton's 1st Law is also called the Law of ...

a)

Friction

b)

Inertia

c)

Unbalanced forces

d)

Newtons

14.
An object in motion tends to stay in motion unless an ___ force acts on it.
a)
unbalanced
b)
balanced
15.
The tendency of an object to resist a change in motion is...
a)
inertia
b)
kinetic energy
c)
vector
d)
net force
16.
Objects with greater _________ also have greater inertia.
a)
speed
b)
mass
c)
temperature
d)
friction
17.
What kind(s) of objects have inertia?
a)
all objects with mass
b)
only objects at rest
c)
only objects in motion
d)
only objects whose motion is being changed
18.
You push on a car and it does not move.  What is true about the inertia?
a)
The inertia is changing
b)
The inertia of the car is too great 
c)
The inertia of the person is equal to the car
d)
There is not inertia because of no movement
19.
An object following a straight-line path at a constant speed 
a)
has zero acceleration
b)
has no forces acting on it
c)
has a net force acting in the direction of motion
d)
none of these
20.
Accelerations are produced by
a)
forces.
b)
 velocities.
c)
 accelerations.
d)
 masses.
21.
What happens when unbalanced forces act on an object at rest?
a)
the object remains at rest
b)
the object begins moving in an unpredictable direction
c)
the object begins moving in the direction of the net force
d)
the object begins moving opposite to the direction of net force
22.
A 20 kg bike accelerates at 10 m/s2.  what was the force
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
23.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
24.
F=MA
An object of mass 10 kg is accelerated upward at 2 m/s2.  What force is required? 
a)
20 N
b)
2 N
c)
5 N
d)
0 N
25.
45 m/s2 is the... 
a)
Mass
b)
Force 
c)
Acceleration
d)
weight
26.
What is a Balanced Force?  Two objects where...
a)
They both have equal force 
b)
One has more force than the other
c)
Both have no force
d)
One has more gravity than the other
27.
Why would one ball accelerate more than the other when pushed with the same amount of force?
a)
Different weights
b)
Different forces
c)
Different masses
d)
Different sizes
28.

Acceleration changes an object's...

a)

speed, direction, or both

b)

speed, gravity, or both

c)

gravity, direction, or both

d)

inertia, speed, or both

29.

Jenny applies a 60 N force to a 20 Kg cart, what is the acceleration of the cart if friction can be neglected?

a)

1200 m/s2

b)

0.33 m/s2

c)

20 m/s2

d)

3 m/s2

30.
Newton's Third Law States...
a)
Objects in motion stay in motion and objects at rest stay at rest
b)
Force is equal to mass times acceleration
c)
For each action there is an equal and opposite reaction
31.
An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...
a)
Air resistance against the bow
b)
the arrow's push against the bowstring
c)
the grip of the archer's hand on the bow
32.
A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction force is...
a)
The grip of the player's hands on the ball
b)
the air resistance of the ball
c)
the force of the ball against the bat
33.
A baseball player bats a ball with a force of 1,000 N. The ball exerts a reaction force (without any additional forces action on it) against the bat of...
a)
Less than 1, 000 N
b)
1,000 N
c)
More than 1,000 N
34.
What is the reaction force to a foot pushing down on the floor?
a)
The foot going through the floor
b)
The floor pushing back against the foot
c)
The floor breaking to the foot
35.
According to Newton's Third law the strength or magnitude of forces will be...
a)
smaller
b)
equal
c)
larger
36.
According to Newton's third law forces come in pairs?
a)
True
b)
False
37.

Choose the answer that has the most GRAVITATIONAL POTENTIAL energy.

a)

a 500 kg boulder on a 5 meter hill

b)

a 500 kg boulder on a 10 meter hill

c)

a 500 kg boulder on a 20 meter hill

38.

Choose the answer that has the most GRAVITATIONAL POTENTIAL energy

a)

a bird flying 7 kmph 3 meters off the ground

b)

a bird flying 7 kmph 6 meters off the ground

c)

a bird flying 10 kmph 3 meters off the ground

39.

What two factors affect GRAVITATIONAL POTENTIAL energy?

a)

mass

b)

height

c)

speed

d)

mass and speed

e)

mass and height

40.

What two factors affect kinetic energy?

a)

mass

b)

speed

c)

height

d)

mass and speed

e)

mass and height

41.

What is the mechanical energy of a system?

a)

just potential energy

b)

just kinetic energy

c)

the sum of the potential and kinetic energy

d)

kinetic energy minus potential energy

42.
__________ is stored energy. 
a)
Potential
b)
Kinetic
43.

A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?

a)

1457 Joules

b)

22,584 Joules

c)

15 Joules

d)

45,167Joules

44.
What would have the greatest kinetic energy?
a)
A car driving down a hill.
b)
A person running down a hill. 
c)
A ball rolling down a hill. 
45.
What is kinetic energy?
a)
energy of work
b)
energy of motion
c)
energy of gravity
d)
energy of power
46.
Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.
a)
18 J
b)
36 J
c)
12 J
d)
6 J
47.
Can energy be destroyed?
a)
no
b)
yes
48.
Can energy be changed?
a)
yes
b)
no
49.
At which position does the pendulum below have the greatest kinetic energy?
a)
3
b)
2 and 4
c)
there is no kinetic energy
d)
1 and 5
50.

The momentum of an object depends upon the object's ___________&_____________.

a)

size and shape

b)

mass and speed

c)

mass and veloctiy

d)

mass and energy

51.
If two objects have the same mass, then the faster moving object has ____________ momentum.
a)
more 
b)
less
c)
the same
52.
Jorge noticed a collision outside the coffee shop where two cars collided and stuck together.  What type of collision did he observe?
a)
Elastic
b)
Inelastic
c)
Completely inelastic
d)
none
53.
While playing pool, Emma notices that the pool balls bounce apart.  What type of collision is this?
a)
Elastic
b)
Inelastic
c)
Explosive
d)
Force
54.
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
a)
25 m/s
b)
375 m/s
c)
25 kg m/s
d)
375 kg m/s
55.

The units for Impulse are

a)

N/s

b)

N·s

c)

N

d)

m/s

56.
Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds.  Which cart experiences the greatest impulse?
a)
Cart B
b)
Cart A
c)
they are the same
57.

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.

a)

1 N·s

b)

6 N·s

c)

66 N·s

d)

None of these

58.
The purpose of crumble zones on a car is to
a)
decrease time of impact.
b)
increase force of impact.
c)
increase the time of impact.
d)
decrease the impulse during impact.
59.
can a bullet have the same momentum a truck?
a)
yes
b)
no
60.

_________________ causes and is equal to a change in momentum

a)

Impulse

b)

Force

c)

Joule

d)

Watt

61.
The total momentum before a collision is _________ the total momentum after a collision.
a)
equal to 
b)
less than 
c)
more than
d)
It depends on the type of collision
62.
You move a 12-newton box up a 6-meter ramp. In order to find out how much power you created, what would you need to know?
a)
The mass of the box
b)
The slope of the ramp 
c)
The direction the box moved
d)
How long the task took
63.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
64.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
65.

Which of the following is the best example of work being done.

a)

doing homework

b)

lifting a box

c)

pushing a stationary box

d)

holding a box

66.
In which of these cases is work being done? 
a)
A student sleeps
b)
A student pushes a locked door that does not move
c)
a student carries his chair into another room
d)
A student sits on the carpet
67.
True or false: when the distance an object moves is zero the work done on the object is also zero.  
a)
True
b)
False
68.

You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?

a)

Yes, work was done

b)

No, work wasn't done

69.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

70.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
71.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

72.
The sun shines down on this family as the play on the beach.
a)
conduction
b)
convection
c)
radiation
73.
A group of friends gather around a fire to stay warm.
a)
conduction
b)
convection
c)
radiation
74.
The Gulf Stream is a current that brings warm ocean water from the south to the north.
a)
conduction
b)
convection
c)
radiation
75.
Walking on the warm sand sand with your bare feet.
a)
conduction
b)
convection
c)
radiation
76.
Which direction will the heat flow while this person holds a hot cup of tea?
a)
from the cup to her hand
b)
from her hand to the cup
c)
no heat is transferred
77.
Warm air rises and the cool air sinks.
a)
conduction
b)
convection
c)
radiation
78.
The warm air from this heater creates a current when the warm air rises and the cold air sinks.
a)
conduction
b)
convection
c)
radiation
79.
Why water is used as a cooling agent in car engine?
a)
Water has low specific heat capacity.
b)
Water has high specific heat capacity.
c)
Water is denser than oil
d)
Water has low boiling point
80.
The specific heat is the amount of energy needed to raise the temperature one degree Celsius of 1 gram of a substance.
a)
True
b)
False
81.
What is the symbol for Thermal Energy?
a)
Q
b)
T
c)
m
d)
Cp
82.
What takes place when a liquid changes to a gas?
a)
condensation
b)
melting
c)
evaporation
d)
freezing
83.

Is the substance gaining or losing energy?

a)

Gaining

b)

Losing

84.

Water has a specific heat of 4.18 J/gºC. Wood has a specific heat of 1.76 J/gºC. What material needs more energy to raise the temperature 1ºC

a)

Wood

b)

Water

c)

Both are the same

85.

What has a higher specific heat?

a)

Rubber Tire

b)

Metal Key

86.

How much heat is needed to raise the temperature of 2.5g of wood from 50oC to 55oC. (Specific Heat of Wood= 1.75)

a)

34.897J

b)

13.5J

c)

21.875J

d)

4.5

87.
5. What is it called when a solid turns directly into a gas?
a)
Sublimation
b)
Condensation
c)
Liquid
88.
What happens to particles when they are heated?
a)
They speed up and spread out
b)
They slow down and compress
c)
They stop moving
d)
They move closer together and speed up
89.
The SI unit of heat and energy is the __________.
a)
calorie
b)
heat
c)
joule
d)
watt
90.
There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?
a)
Large cup (Trenta)
b)
Small cup (Tall)
c)
Venti
d)
All three are the same temperature so they have same thermal energy
91.
Calculate the heat absorbed by 105.0 grams of water when it is heated to cook spaghetti. The initial temperature of the water is 20.0°C, and the final temperature of the water is 99.0°C. The specific heat of water is 4.18 J/g•°C.
a)
8778 J/g°C
b)
0.0005 J/g°C
c)
34673 J/g°C
d)
43451.1 J/g°C
92.

If two objects have different temperatures when they come in contact, heat will flow from the warmer object to the cooler one UNTIL ____________

a)

one reaches a temperature of zero

b)

they both have an equal temperature

c)

one runs out of energy

93.
The total energy of all the particles in a substance is called: 
a)
temperature
b)
thermal energy
c)
degrees
d)
mass
94.

Calorimetry Question:

A piece of metal with a mass of 32.8 g is heated to 100.5°C and dropped into 138.2 g of water at 20.0°C. The final temperature of the system is 30.2°C. What is the specific heat capacity of the metal?

a)

2.56 J/g°C

b)

0.391 J/g°C

c)

5.29 J/g°C

d)

3.50 J/g°C

95.

With the release of Star Wars Episode IX this weekend, how many spoilers will you reveal to anyone?

a)

Zero. I'm a good person.

b)

One. I'm awful.

c)

Some. I'm awful.

d)

Lots. I'm essentially a Comcast Customer Service Representative level of awful

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