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Semester Exam Physics Fall 2021

Total questions: 70

Worksheet time: 3hrs 41mins

Name
Class
Date
1.

This is an area of physics that studies motion and its causes

a)

thermodynamics

b)

mechanics

c)

quantum mechanics

d)

optics

2.

SI base unit used to measure mass is the

a)

meter

b)

kilometer

c)

gram

d)

kilogram

3.

If five darts strike near the center of a target. The dart thrower is

a)

accurate

b)

precise

c)

both accurate and precise

d)

neither accurate nor precise

4.
The greek letter Δ indicates a(n):
a)
difference or change
b)
sum or total
c)
direct proportion
d)
inverse proportion
5.

Please arrange these symbols of units of length in order from smallest to largest are

a)

m, cm, mm ,km

b)

mm, m, cm, km

c)

km, mm, cm, m

d)

mm, cm, m, km

6.

These values were obtained as the mass of a bar of metal: 8.83g, 8.84g, 8.82g but the known mas is 10.68 g. These values are

a)

accurate

b)

precise

c)

both accurate and precise

d)

neither accurate nor precise

7.

Calculate the following and express the answer in scientific notation with the correct number of significant figures

10.5 x 8.8 x 3.14 =

a)

2.9 x 102

b)

2.90 x 102

c)

290

d)

290.1

8.

6 kg =___________g. Which is the correct set up below?

a)

6g x (1g/1000 kg) =6,000 g

b)

6g x (1000g/1kg) = 6,000 g

c)

6kg x (1,000 g/1kg) = 6,000 g

d)

6 kg x (1kg/1,000g) =4,000 g

9.

How many significant figures in the number 2,000.000

a)

1

b)

4

c)

7

d)

6

10.

How many significant figures are in the number 0.003350?

a)

7

b)

6

c)

3

d)

4

11.

Round the number 3.92 to 1 significant figure

a)

3.9

b)

4

c)

3

d)

3.0

12.

Place this number in scientific notation: 0.00035350

a)

3.5 x 104

b)

3.5 x 10-4

c)

3.5350 x 10-4

d)

4 x 104

13.

#1) Which shows a proportional relationship?

a)

A

b)

B

c)

C

d)

D

14.

In a graph x is on the ___________ axis and is the ___________ variable.

a)

horizontal, independent

b)

horizontal, dependent

c)

vertical, independent

d)

vertical, dependent

15.

If two students conduct an experiment and are trying to determine the effect that length of a pendulum has on the period of its vibration. What is the independent variable?

a)

length

b)

pendulum

c)

vibration

d)

period

16.

How do we know that motion has occurred?

a)

The reference point has changed.

b)

The position of the object has changed.

c)

The object has changed.

17.

This involves a magnitude and direction

a)

scalar

b)

vector

c)

both of the above

d)

none of the above

18.

On my way to DQ I walked 3.2 meters East and then 7.2 meters west. What is my distance and displacement?

a)

Distance 10.4 west, Displacement 10.4 meters east

b)

Distance 10.4 meters, Displacement 4.0 meters east

c)

Distance 10.4 meters, and Displacement 4.0 meters west

d)

Distance 10.4 meters east, and Displacement 10.4 meter west

19.

Speed that remains the same or does not change

a)

Distance

b)

Constant Speed

c)

Mass

d)

Acceleration

20.

A point used to determine the position of an object

a)

reference point

b)

mass

c)

speed

d)

acceleration

21.

Slope is

a)

run/rise

b)

rise/run

c)

run x rise

d)

run + rise

22.

What is the speed of an object that travels 60 meters in 4 seconds?

a)

240 m/s

b)

0.67 m/s

c)

15 m/s

d)

15 mi/hr

23.

How would you calculate the speed for a car that went a distance of 125 kilometers in 2 hours time?

a)

125 ÷ 2

b)

125 × 2

c)

2 ÷ 125

d)

2 +125

24.

How would you calculate the time it takes for a bird flying at a speed of 45 km/hr to travel a distance of 1,800 kilometers?

a)

45 ÷ 1,800

b)

45 × 1,800

c)

1,800 ÷ 45

d)

1,800 - 45

25.

A car slows down from +32 m/s to +8 m/s in 4 s. What variable is the 32 m/s representing in this problem?

a)

initial velocity

b)

final velocity

c)

time

d)

acceleration

26.

A hummingbird averages a speed of about 45 km/hour (Cool facts: They visit up to 1000 flowers per day, and reach maximum speed, while diving, up to 160 km/hour!). Ruby-throated hummingbirds take a non-stop trip across Gulf of Mexico in which they fly for 18 hours straight! How far is the trip across the Gulf. This problem is solving for?

a)

time

b)

acceleration

c)

velocity

d)

distance

27.

A car is traveling at 7.0 m/s accelerates at 2.5 m/s2. It reaches a speed of 12.0 m/s. How long does it take for this acceleration to occur? What is this problem solving for?

a)

initial velocity

b)

final velocity

c)

time

d)

displacement

28.

A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 min. How fast is the car moving after this time? What is this problem solving for?

a)

acceleration

b)

final velocity

c)

initial velocity

d)

displacment

29.

A car is initially moving at 10 m/s and accelerates at a constant rate of 2 m/s2 for 4 seconds, in a straight line. How far did the car travel during this time?

a)

56m

b)

48m

c)

32m

d)

18m

30.

An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until it finally lifts off the ground. Determine the distance traveled before takeoff.

a)

850 m

b)

1250 m

c)

1500 m

d)

1720 m

31.

A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car.

a)

6.7m/s^2

b)

8.10 m/s^2

c)

10.2m/s^2

d)

12.9m/s^2

32.

A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the acceleration of the car

a)

8.9m/s^2

b)

10.7m/s^2

c)

11.2 m/s^2

d)

14.9m/s^2

33.

The unit we use to measure acceleration is ___.

a)

m

b)

s

c)

m/s

d)

m/s2

34.

An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s2. The takeoff speed for this plane will be 65 m/s. All airplanes will start from rest. Assuming this minimum acceleration, what is the minimum allowed length for the runway?

Choose the correct equation

a)

v=vo+at

b)

v2=vo2+2ad

c)

d=vot+1/2at2

d)

d=1/2(v+vo)t

35.
What is the SI unit for acceleration?
a)
m/s
b)
m
c)
m/s2
d)
s
36.

An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.

Which equation is appropriate?

a)

vf=vi+at

b)

Δx=vit+1/2at2

c)

vf2=vi2+2aΔX

d)

Δx=((vf+vi)/2)t

37.

Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.83 seconds, then what is the distance that the sled travels?

Choose the appropriate equation.

a)

vf=vi+at

b)

Δx=vit+1/2at2

c)

vf2=vi2+2aΔX

d)

Δx=((vf+vi)/2)t

38.
What is the definition of acceleration?
a)
a=Δv/t
b)
a=Δx/t
c)
a=xf-xi
d)
a=Δvt
39.
What is the definition of velocity?
a)
=Δv/t
b)
=Δx/t
c)
=xf-xi
d)
=Δxt
40.

A car is initially moving at 10 m/s and accelerates at a constant rate of 2 m/s2 for 4 seconds, in a straight line. How far did the car travel during this time?

a)

56m

b)

48m

c)

32m

d)

18m

41.

A cyclist travelling at a speed of 4.2 m s-1 accelerates at 1.1 m s-2. In a time of 7.4 s, the distance travelled is

a)

30 m

b)

35 m

c)

61 m

d)

91 m

42.

A bus is travelling at a speed of 9.0 m s-1. It then accelerates at a rate of 0.75 m s-2 for a time of 8.0 s. What therefore is its final speed?

a)

6.0 m s-1

b)

15 m s-1

c)

17 m s-1

d)

21 m s-1

43.

A ball is dropped from rest from a building 35.0 m high. If air resistance is neglected, then the ball will hit the ground with a speed of

a)

8.4 m s-1

b)

13.1 m s-1

c)

18.5 m s-1

d)

26.2 m s-1

44.
If you throw a baseball straight up, what is its velocity at the highest point?
a)
9.8 m/s2
b)
9.8 m/s
c)
0 m/s2
d)
0 m/s
45.
The more mass an object has, the faster it will fall.
a)
True
b)
False
46.

Next semester I plan to

a)

do the same as I did first semester

b)

try to keep up more

c)

try not to be so lazy

d)

get my work done on time

47.

The teacher could improve by

a)

giving more time for assignments

b)

not giving so many assignments

c)

more nearpod lessons

d)

more discussion questions

48.

What is 1 goal you have for next semester?

4 lines
49.

Physics was really hard because

a)

I didn't do my part

b)

I am not really good at math

c)

the subject does not interest me

d)

I am really lazy

50.
As an object falls freely in a vacuum, its
a)
velocity increases
b)
acceleration increases
c)
both a and b
d)
none of the above
51.
A Boeing 747 lands with a velocity of 180 ms-1 and decelerates at 6 ms-2 coming to a halt in 30 seconds. Calculate the distance it took for the aircraft to come to a halt
a)
2.7 m
b)
27 m
c)
2700 cm
d)
2.7 km
52.
An object dropped from the top of a cliff takes 2.85 s to hit the water in the lake below:What is the cliff's height above the water?
a)
3.98 m
b)
398 m 
c)
39.8 m
d)
3.98 km
53.

A car driving at 50 miles per hour drives for 2 hours. What distance did it cover?

a)

50 miles

b)

25 miles

c)

100 miles

d)

75 miles

54.

If a car is moving at constant velocity, the car's acceleration is...

a)

0 m/s2

b)

9.8 m/s2

c)

-9.8 m/s2

d)

not enough information

55.
How do you combine vectors if they are in opposite directions?
a)
Add
b)
Subtract
c)
Pythagorean Theorem
d)
Use trigonometry
56.

Vector is a quantity with:

a)

magnitude and direction

b)

magnitude

c)

direction

d)

none of the above

57.

What is the resultant of the two vectors shown above?

a)

5 upward

b)

5 downward

c)

15 upward

d)

15 downward

58.
Two objects - one with mass m and the other with mass 2m - are released from rest at the same height. Which object hits the ground first?
a)
mass m
b)
mass 2m
c)
both objects hit the ground at the same time
d)
unable to determine with information given
59.
A toy airplane is thrown straight up. At the top of its path its instantaneous speed is _____.
a)
9.8 m/s
b)
0 m/s
c)
same as it's starting speed
d)
more information is needed
60.
Twenty seconds after starting from rest, a freely falling object will have a speed of about _____.
a)
20 m/s
b)
0.49 m/s
c)
9.8 m/s
d)
196 m/s
61.

The gravitational acceleration of an object in a vacuum near the surface of the Earth is defined as:

a)

g = 9.8 m/s.

b)

g = 9.8 m.

c)

g = 9.8 m/s2.

d)

g = 9.8 s.

62.

________________ is any motion of a body where gravity is the only force acting upon it.

a)

kinematics

b)

free fall

c)

mechanics

d)

velocity

63.

When an object falls, ______________________________.

a)

It accelerates at a constant rate until it hits the ground

b)

It accelerates at a non-constant rate until it hits the ground

c)

It accelerates at a constant rate until it reaches terminal velocity

d)

It accelerates at a non-constant rate until it reaches terminal velocity

64.

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

a)

the velocity increases by about 10 m/s each second

b)

the velocity decreases by about 10 m/s each second

c)

the velocity remains constant

65.

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

a)

the acceleration increases by about 10 m/s each second.

b)

the acceleration decreases randomly.

c)

the acceleration remains constant.

66.

If an object is in free fall for three seconds, about how far will it have fallen?

a)

9.8 m/s

b)

5 m

c)

20 m

d)

45 m

67.

What happens to the velocity of a ball as it is dropped off a cliff?

a)

It decreases at a uniform rate

b)

It increases at a uniform rate

c)

It is constant

d)

It increases at a non-uniform rate

68.

What do you think about this exam or review?

a)

It's way too long. The teacher is just crazy!

b)

I know most of it

c)

It is really hard

d)

I don't know any of it because I don't pay attention.

69.

Next semester we will be doing several projects including roller coasters projectiles and windmills. How do you feel about the projects

a)

I like them because they count as CBA grades

b)

They are boring

c)

I don't know because I never do them

d)

I get credit but someone else does all the work.

70.

You are finally at the end of the semester. How do you feel you did?

a)

I did my best

b)

I could have done better

c)

I am lazy

d)

I have no idea

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