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Physics Midterm Review

Total questions: 71

Worksheet time: 4hrs 33mins

Name
Class
Date
1.

The one factor that a scientist changes during an experiment.

a)

Controlled Variable

b)

Dependent Variable

c)

Independent Variable

2.

The variable that is measured.

a)

Controlled Variable

b)

Dependent Variable

c)

Independent Variable

3.
Ramone wants to know: does the distance a person kicks a soccer ball effect how well they will do on their math test.  What is the dependent variable?
a)
How far they kick the soccer ball
b)
who the person is
c)
how well they do on the math test
d)
Type of soccer ball.
4.
On a graph, which axis shows the dependent variable?
a)
x-axis
b)
y-axis
c)
neither
d)
it changes
5.
On a graph, which axis shows the independent variable?
a)
x-axis
b)
y-axis
c)
neither
d)
it changes
6.
Identify the independent variable:
The height of bean plants depends on the amount of water they receive. 
a)
The bean seed
b)
The amount of water provided daily
c)
The amount of sunlight they're exposed to daily
d)
How tall they grow by the end of the experiment
7.
 If you do not understand a direction or part of a lab procedure, you should 
a)
skip it and go on to the next part.
b)
ask the instructor before proceeding
c)
try several methods until something works
d)
figure it out as you do the lab
8.
You are heating a substance in a test tube. Always point the open end of the tube 
a)
away from all people
b)
toward another classmate
c)
toward your lab partner
d)
toward yourself
9.

What is the safest way to smell a substance during a lab?

a)

Lean over and smell it directly

b)

Put it on your hand and smell it

c)

Waft the air towards your face

d)

Lift the substance to your nose

10.

Write the following number in scientific notation.

360

a)

3.6×1023.6\times10^2  

b)

0.36×1020.36\times10^2  

c)

3.6×1033.6\times10^3  

d)

3.6×10−23.6\times10^{-2}  

11.

Write the following number in standard form. Type your answer with no spaces and no commas.

5.7×10−15.7\times10^{-1}  

(a)  

12.

Write the following number in standard form. Type your answer with no spaces and no commas.

4.35×1054.35\times10^5  

(a)  

13.

Choose the bigger number.

a)

2.45×10−62.45\times10^{-6}  

b)

7.3×10−87.3\times10^{-8}  

14.

7,000 g = ____ kg

a)

70

b)

700

c)

7

d)

0.07

15.

648 g = ____ mg

a)

6,480

b)

64,800

c)

648,000

d)

64.8

16.

68 cm = ___________ mm

a)

0.68

b)

6.8

c)

68

d)

680

17.

565,900 seconds into days

a)

3.5 days

b)

4 days

c)

6.5 days

d)

6 days

18.

165 pounds into kilograms

a)

77 kilograms

b)

75 kilograms

c)

120 kilograms

d)

132 kilograms

19.

100 yards into meters

a)

91.46 meters

b)

92.54 meters

c)

87.34 meters

d)

86.23 meters

20.

Which of the following are examples of qualitative observations?

a)

36 tons

b)

blue bubbles

c)

hot

d)

loud

e)

5 grams

21.

There are clouds in the sky. It is going to rain.

a)

Observation

b)

Inference

22.

Amy got a 100%

on her math test. Girls are better at math.

a)

Observation

b)

Inference

23.

SI unit for weight is

a)

Newton

b)

Kilogram

c)

Meter

d)

Watt

24.

Acceleration is measured in

a)

m/d3

b)

g/n

c)

m/s2

d)

k/j2

25.

Speed and velocity are measured in the same SI unit

a)

True

b)

False

26.

The SI unit for mass is _________.

a)

Pounds

b)

Inches

c)

Kilograms

d)

Ounces

27.
a)
hot plate
b)
flame thrower
c)
heater
d)
bunsen burner
28.
a)
buret
b)
erlenmeyer flask
c)
graduated cylinder
d)
beaker
29.
a)
ignition tubes
b)
test tubes
c)
graduated cylinders
d)
burets
30.
Identify the equipment shown here:
a)
beaker
b)
Erlenmeyer flask
c)
Florence flask
d)
volumetric flask
31.

A train is moving at a velocity of 15 m/s East. A passenger at the back of a train throws a baseball with a speed of 15 m/s West. What is the velocity of the baseball relative to the ground? (In other words: how fast does a person on the ground see the ball move?)

a)

30 m/s East

b)

15 m/s West

c)

0 m/s

d)

30 m/s West

32.
Which statement describes a vector?
a)
It has magnitude but no direction
b)
It has direction but no magnitude
c)
It has both direction and magnitude
d)
It has constant magnitude but no
 direction
33.
Which of these is not a vector quantity? 
a)
displacement 
b)
time
c)
velocity 
d)
acceleration
34.
30 m/sec, East. Scalar or Vector
a)
Scalar
b)
Vector
c)
Neither
35.

If an object changes its velocity from 2 m/s to 4m/s in 10s, its acceleration is__________m/s2

a)

0.02

b)

2

c)

0.2

d)

0.6

36.

The distance - time graph for a moving object is a straight line parallel to the time axis. The object is (a)  

37.

a body moves 200 m in 40 sec, the speed equals -----

a)

5 m/s

b)

50 m/s

c)

5 km/h

d)

50 km/h

38.
What does this graph represent?
a)
Constant Speed
b)
Acceleration
c)
Not moving
39.
According to the graph how far does the person travel in the first 5 seconds?
a)
2 m
b)
10 m
c)
0 m
d)
5 m
40.
When you look at the speedometer of your car, it tells you your....
a)
Average speed
b)
Instantaneous speed
41.

A textbook is dropped from a second floor window and falls to the ground. What happens to the velocity as the book falls to the ground

a)

the velocity increases

b)

the velocity decreases

c)

the velocity remain constant

42.

A baseball is thrown up into the air. What happens to the velocity as the ball rises in the air?

a)

the velocity increases

b)

the velocity decreases

c)

the velocity remains constant

43.

A ball is thrown upward with an initial speed of 30m/s. At what location will the ball be moving downward with a speed of 20m/s

a)

A

b)

B

c)

E

d)

F

44.

If a dropped object on Earth was equipped with a speedometer, its speed reading would increase each second by

a)

about 5 m/s.

b)

about 10 m/s.

c)

about 15 m/s.

d)

a rate that depends on its initial speed.

45.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
46.
What law is best described by inertia?
a)
1st
b)
2nd
c)
3rd
d)
law of conservation of mass
47.
What Unit do we Measure Force in? 
a)
Newtons
b)
Joules
c)
Force
d)
Kilograms
48.
With unbalanced forces, the object will move in the direction that the _______ force is being applied.
a)
larger 
b)
smaller 
c)
equal 
d)
less
49.

Which of Newton's laws applies best?

A person is pushed forward into their seatbelt when a car stops.

a)
1st
b)
 2nd
c)
2 and 3
d)
3rd 
50.

The forces on this chandelier are...

a)

Gravity

b)

Gravity and Normal

c)

Gravity and Tension

d)

Gravity, Tension, Friction, and Applied

51.

The car in the picture is moving at a constant velocity. What forces does the car experience?

a)

Gravity

b)

Gravity and Normal

c)

Gravity, Normal, and Friction

d)

Gravity, Normal, Friction, and Applied

52.

An object that is at rest will begin to move if which of the following is true?

a)

The surface on which it rests is frictionless

b)

The mass of the object is sufficient

c)

Unbalanced forces act on the object

d)

Gravity on the object can be reduced

53.
What is the force necessary to accelerate a 1785 kg car at a rate of 50 m/s/s?
a)
89,250 N
b)
35.7 N
c)
98.8 N
d)
75,620 N
54.
A measure of how much matter an object has is--
a)
weight
b)
gravity
c)
mass
d)
volume
55.
What is the definition of "weight"?
a)
measure of the force of gravity on your body
b)
the time it takes to get on a ride 
c)
the amount of matter in an object
d)
the size of an object
56.
If you increase the mass on an object, its acceleration
a)
decreases
b)
stays the same
c)
also increases
d)
stops
57.
The amount of inertia an object has depends on its 
a)
speed
b)
volume
c)
mass
d)
length
58.

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

59.
Determine the momentum of 1000-kg car moving northward at 20 m/s......... 
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s
d)
20000 kg * m/s north
60.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
61.
When the speed of an object is doubled, its momentum
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
62.
Which object listed below has the greatest momentum?
a)
A 0.05 kg object rolling at 0.2 m/s.
b)
A 0.15 kg object rolling at 2 m/s.
c)
A 0.15 kg object rolling at 1 m/s
d)
A 0.4 kg object rolling at 2 m/s.
63.
A runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s. What is his mass?
a)
74.4 kg
b)
6030 kg
c)
0.0134 kg
d)
80 kg
64.

Collisions where objects BOUNCE apart.

a)

inelastic collisions

b)

elastic collisions

c)

explosions

d)

none of these

65.
Which of the following has the largest amount of momentum?
a)
A semi-truck traveling at highway speeds
b)
A college track athlete running a race
c)
A baby crawling on the floor
d)
A student sitting at a desk
66.
A(n) _________________ causes and is equal to a change in momentum
a)
impulse
b)
force
c)
joule
d)
watt
67.
The units for Impulse are
a)
N/s
b)
N-s
c)
N
d)
m/s
68.

A 5 N force is applied to a 3 kg ball to slow it down from 9 m/s to 3 m/s. What is the impulse on the ball?

a)

-2.5 N⋅s

b)

-10 N⋅s

c)

-18 N⋅s

d)

-45 N⋅s

69.
A 40-kilogram mass is moving across a horizontal surface at 5.0 m/s.  What is the magnitude of the net force required to bring the mass to a stop in 8.0 seconds?
a)
1 N
b)
40 N
c)
25 N
d)
5 N
70.
While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?
a)
2 m/s
b)
8 m/s
c)
-2 m/s
d)
1.5 m/s
71.

A 2200kg car travelling at 30m/s collides with another 2200kg car that is at rest. The two bumpers lock and he cars move forward together. What is their final velocity?

a)

30 m/s

b)

15 m/s

c)

0 m/s

d)

12.5 m/s

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