PHY-102: Energy and Circular Motion Exercises Complete the following exercises. 1. A rifle with a longer barrel can fire bullets with a larger velocity than a rifle with a shorter barrel. a. Explain this using the impulse-momentum theorem. b. Explain this using the work-energy theorem 2. Use physics terms to explain the benefits of crumple zones in modern cars. 3. When a gun is fired at the shooting range, the gun recoils (moves backward). Explain this using the law of conservation of momentum. 4. Rank the following in terms of increasing inertia: A. A 10,000 kg train car at rest B. A 100 kg person running at 5 m/s C. A 1200 kg car going 15 m/s D. A 15 kg meteor going at a speed of 1000 m/s 5. Rank the following in terms of increasing momentum: A. A 10,000 kg train car at rest B. A 100 kg person running at 5 m/s C. A 1200 kg car going 15 m/s D. A 15 kg meteor going at a speed of 1000 m/s 6. Rank the following in terms of increasing kinetic energy: A. A 1200 kg car going 15 m/s B. A 10,000 kg train car at rest C. A 15 kg meteor going at a speed of 1000 m/s D. A 100 kg person running at 5 m/s 7. Ben (55 kg) is standing on very slippery ice when Junior (25 kg) bumps into him. Junior was moving at a speed of 8 m/s before the collision and Ben and Junior embrace after the collision. Find the speed of Ben and Junior as they move across the ice after the collision. Give the answer in m/s. Describe the work you did to get the answer. 8. Identical marbles are released from the same height on each of the following four frictionless ramps. Compare the speed of the marbles at the end of each ramp. Explain your reasoning. 9. A force of only 150 N can lift a 600 N sack of flour to a height of 0.50 m when using a lever as shown in the diagram below. a. Find the work done on the sack of flour (in J). b. Find the distance you must push with the 150 N force on the left side (in m). c. Briefly explain the benefit of using a lever to lift a heavy object. 10. Rank the following in terms of increasing power. A. Doing 100 J of work in 10 seconds. B. Doing 100 J of work in 5 seconds. C. Doing 200 J of work in 5 seconds. D. Doing 400 J of work in 30 seconds. 11. A student lifts a 25 kg mass a vertical distance of 1.6 m in a time of 2.0 seconds. a. Find the force needed to lift the mass (in N). b. Find the work done by the student (in J). c. Find the power exerted by the student (in W). 12. A satellite is put into an orbit at a distance from the center of the Earth equal to twice the distance from the center of the Earth to the surface. If the satellite had a weight at the surface of 4000 N, what is the force of gravity (weight) of the satellite when it is in its orbit? Give your answer in newtons, N. 13. Consider a satellite in a circular orbit around the Earth. a. Why is it important to give a satellite a horizontal speed when placing it in orbit? b. What will happen if the horizontal speed is too small? c. What will happen if the hori ...

1. PHY-102: Energy and Circular Motion Exercises
Complete the following exercises.
1. A rifle with a longer barrel can fire bullets with a larger
velocity than a rifle with a shorter barrel.
a. Explain this using the impulse-momentum theorem.
b. Explain this using the work-energy theorem
2. Use physics terms to explain the benefits of crumple zones in
modern cars.
3. When a gun is fired at the shooting range, the gun recoils
(moves backward). Explain this using the law of conservation of
momentum.
4. Rank the following in terms of increasing inertia:
A. A 10,000 kg train car at rest
B. A 100 kg person running at 5 m/s
C. A 1200 kg car going 15 m/s
D. A 15 kg meteor going at a speed of 1000 m/s
5. Rank the following in terms of increasing momentum:
A. A 10,000 kg train car at rest
B. A 100 kg person running at 5 m/s
C. A 1200 kg car going 15 m/s
D. A 15 kg meteor going at a speed of 1000 m/s
6. Rank the following in terms of increasing kinetic energy:
A. A 1200 kg car going 15 m/s
B. A 10,000 kg train car at rest
C. A 15 kg meteor going at a speed of 1000 m/s
D. A 100 kg person running at 5 m/s

2. 7. Ben (55 kg) is standing on very slippery ice when Junior (25
kg) bumps into him. Junior was moving at a speed of 8 m/s
before the collision and Ben and Junior embrace after the
collision. Find the speed of Ben and Junior as they move across
the ice after the collision. Give the answer in m/s. Describe
the work you did to get the answer.
8. Identical marbles are released from the same height on each
of the following four frictionless ramps.
Compare the speed of the marbles at the end of each ramp.
Explain your reasoning.
9. A force of only 150 N can lift a 600 N sack of flour to a
height of 0.50 m when using a lever as shown in the diagram
below.
a. Find the work done on the sack of flour (in J).
b. Find the distance you must push with the 150 N force on the
left side (in m).
c. Briefly explain the benefit of using a lever to lift a heavy
object.
10. Rank the following in terms of increasing power.
A. Doing 100 J of work in 10 seconds.
B. Doing 100 J of work in 5 seconds.
C. Doing 200 J of work in 5 seconds.
D. Doing 400 J of work in 30 seconds.
11. A student lifts a 25 kg mass a vertical distance of 1.6 m in a
time of 2.0 seconds.
a. Find the force needed to lift the mass (in N).
b. Find the work done by the student (in J).
c. Find the power exerted by the student (in W).

3. 12. A satellite is put into an orbit at a distance from the center
of the Earth equal to twice the distance from the center of the
Earth to the surface. If the satellite had a weight at the surface
of 4000 N, what is the force of gravity (weight) of the satellite
when it is in its orbit? Give your answer in newtons, N.
13. Consider a satellite in a circular orbit around the Earth.
a. Why is it important to give a satellite a horizontal speed
when placing it in orbit?
b. What will happen if the horizontal speed is too small?
c. What will happen if the horizontal speed is too large?
14. If you drop an object from a distance of 1 meter above the
ground, where would it fall to the ground in the shortest time:
Atop Mt. Everest or in New York?
15. Why do the astronauts aboard the space station appear to be
weightless?
16. Why do the passengers on a high-flying airplane not appear
weightless, similar to the astronauts on the space station?
17. A ranger needs to capture a monkey hanging on a tree
branch. The ranger aims his dart gun directly at the monkey
and fires the tranquilizer dart. However, the monkey lets go of
the branch at exactly the same time as the ranger fires the dart.
Will the monkey get hit or will it avoid the dart?
The remaining questions are multiple-choice questions:
18. Compared to its weight on Earth, a 5 kg object on the moon
will weigh
A. the same amount.
B. less.
C. more.

4. 19. Compared to its mass on Earth, a 5 kg object on the moon
will have
A. the same mass.
B. less mass.
C. more mass.
20. The reason padded dashboards are used in cars is that they
A. look nice and feel good.
B. decrease the impulse in a collision.
C. increase the force of impact in a collision.
D. decrease the momentum of a collision.
E. increase the time of impact in a collision.
21. Suppose you are standing on a frozen lake where there is no
friction between your feet and the ice. What can you do to get
off the lake?
A. Bend over touching the ice in front of you and then bring
you feet to your hands.
B. Walk very slowly on tiptoe.
C. Get on your hands and knees and crawl off the ice.
D. Throw something in the direction opposite to the way you
want to go.
22. A car travels in a circle with constant speed. Which of the
following is true?
A. The net force on the car is zero because the car is not
accelerating.
B. The net force on the car is directed forward, in the direction
of travel.
C. The net force on the car is directed inward, toward the center
of the curve.
D. The net force on the car is directed outward, away from the
center of the curve.
23. A job is done slowly, and an identical job is done quickly.
Which of the following is true?

5. a. They require the same amount of force, but different amounts
of work.
b. They require the same amount of work, but different amounts
of power.
c. They require the same amounts of power, but different
amounts of work.
d. They require the same amounts of work, but different
amounts of energy.
24. How many joules of work are done on a box when a force of
60 N pushes it 5 m in 3 seconds?
a. 300 J
b. 12 J
c. 100 J
d. 36 J
e. 4 J
25. A 1 kg cart moving with a speed of 3 m/s collides with a 2
kg cart at rest. If the carts stick together after the collision, with
what speed will they move after the collision?
a. 3 m/s
b. 1.5 m/s
c. 1 m/s
d. 2 m/s
© 2014. Grand Canyon University. All Rights Reserved.
Running Head: PROFESSIONAL DEVELOPMENT PLAN
1
PROFESSIONAL DEVELOPMENT PLAN
Professional Development Plan

6. Kiara Bonds
Student ID: A01014949
Program: Ms in Human Services
Specialization: General
Professional Development Plan
Part 1: Professional Goals
Professional Introduction
I am a MS. student pursuing Human services, my academic
goals are acquiring knowledge and skills required to effectively
serve the clients, access resources and provide services that
support people in the society. I am also aiming at developing
skills in communication, direct service delivery, and human
services organization administration. Additionally, I also have
some goals in the human service professionals are enabling
members to live more productive and satisfying lives, by use of
the society's norms, available resources, and technical
innovations. In the course of my career I expect to carry the
following professional and personal efforts into my future
works; comprehending the essence of human systems, this
includes personal group, organization, and communities and
their main interaction. Being aware of the conditions which help
or limit excellent performance and class alteration from the

7. desired working in the main human systems. Finding out
interventions that boost growth and goals achievements. (What
are human services? n.d.).
Professional and Academic Background
I have a postgraduate degree in human services, with these
qualifications I have a great chance of securing a chance in the
agency and then being promoted within the same organization
concerning my educational background. Upon acquiring my
Bachelor’s degree I worked as a Child Service Professional at a
community-based organization.
Goal Statements and Their Relation to Academic Research
At the end of this study, I expect to meet my goals as a
professional human service officer. This is because through
academic research I will be able to acquire critical thinking
skills, through this I will have the ability to think creative ideas
concerning my goals Academic research will also help me to
gain knowledge which will assist me in performing my duties.
Also, academic research will help me create a balance between
collaborative work and individual work.
Reflection of Walden's Mission Statement
One of my goals is to enable the members of society to live a
better more productive and satisfying life. This goal goes hand
in hand with Walden university mission since it aims at
instilling their students with skills that can impact the society
with positive changes. The institutions aim at transforming at
gives the learners with a diverse community of career
professionalism which may aid in me gaining enough
competence in my career. (Walden University, 2018).
Attainment of the Advanced Degree Related to Goals
Through the excellent studies offered at Walden, I am sure that
I will attain my study goals. The university takes academic
research very seriously, this research may help me in attaining
my goals. I chose to do my study at Walden University since it
has convenient time management, it provided a favorable

8. context for me since I am working and I as well require to
balance work and the demands of schools. (7 Benefits of a
virtual classroom, n.d.).
Part 2: Educational Background and Research Proficiency
Academic Coursework in the Social and Behavioral Sciences
In the course of my study, I have been able to acquire
knowledge and competencies in the following field;
· Social and human service personnel
· Drug and substance abuse intern
· Society outreach
· Family advocate
Academic Coursework in Other Fields
· Outclass experiences which provide a platform to engage with
health and education experts.
· Involvement in a health club which had aimed at helping
people in the community live better lives.
· Professional conference presentations and talks.
Professional Presentations, Seminars, Training, and Workshops
· I underwent training on effective handling conflict, providing
feedback and engaging in difficult employees.
· I did a community presentation in a seminar where I talked to
society about the problems and action plans of the community.
· I went through a short course in a team performance which
equipped with knowledge and skills to work with a team and
produce good results.
· I attended a workshop in conflict resolutions and negotiation
skills.
Volunteer Work
I once volunteered to serve as a mental health and drug abuse
social worker intern in a community-based organization. I
would mentor people with substance and drug abuse problems
as well as serve people with mental illnesses.
Past Research, Publications, and Teaching Assignments
· I researched on how drug abuse has impacted the youths in
California.

9. · I also researched ways to improve the living standards of the
poor in California.
Access to Research Materials
In my graduate study, I will access the online databases such as
the Walden University’s online library where I will access
online books. I’ll also access other online academic websites
where I will search for the required information. Also, I’ll use
the available local variable where I will borrow books when
required.
Academic and Research Strengths and Weaknesses
Some of the strengths of research are that it enhances self-
learning, a better understanding of a given topic it as well as
aids in ensuring that the researchers identify things that are
associated with a topic. However research has its limitations
such as some of the sources may drop the study before
finishing, some of the sources of information may try to
participate in the same study more than once and it is also hard
to find out which interpretation is the best. (Claire, 2015).
Conclusion.
I believe I am ready for the graduate study since I am aware of
what I am going to achieve after the studies as well as that
which is required to be successful at the end of the study. I also
believe that I have just enough time to study as well as the
finance required for me to take up this study.
References

10. 7 Benefits of a virtual classroom. (n.d.). Retrieved from
https://www.waldenu.edu/programs/resource/seven-benefits-of-
a-virtual-classroom
Claire. (2005, July 24). The advantages and disadvantages of
different research methods. Retrieved from
https://generic.wordpress.soton.ac.uk/ethnographicencounters/2
015/07/24/the-advantages-and-disadvantages-of-different-
research-methods/
Walden University. (2018). Vision, mission, and goals.
Retrieved from
https://catalog.waldenu.edu/content.php?catoid=61&navoid=923
6Weedmark David. (2019, February 19). What Are Some Jobs in
the Human Service Field? Retrieved from
https://work.chron.com/jobs-human-service-field-15082.html
Wilson Leah. (n.d.). What job can I get with a Master’s in
human services? Retrieved from
https://www.bestcollegevalues.com/job-get-masters-human-
services/
What are the human services? (n.d.). Retrieved from
https://www.nationalhumanservices.org/what-is-human-
serviceshttps://catalog.waldenu.edu/content.php?catoid=61&nav
oid=9236
Running head: PROFESSIONAL DEVELOPMENT PLAN
1
Professional Development Plan
Student: Maxine Roberts [email protected]
Student ID # 123456789
Program: PhD in Human Services
Specialization: General
Walden University

11. September 30, 2015
Professional Development Plan
Part 1: Professional Goals
Professional Introduction
Start off with a clear paragraph that describes your academic
and professional goals. Include the name of your specialization,
if relevant, and possible career goals and special academic
interests. List past professional and personal efforts that you
will likely carry into future work. This paragraph will be
extremely useful to assist those assigning mentors who will
guide your academic work after HUMN 6000/8000 is completed.
Professional and Academic Background
Discuss your education and work history, using details to help
create a clear picture of the chronology, locations, and type of
work or study involved. You do not need to provide elaborate
details here as you will be discussing the nature of your past
pursuits in Part 2.
Goal Statements and Their Relation to Academic Research
Here you will answer the question of how your graduate study
at Walden will contribute to meeting your overall goals. Be
sure to discuss both your goals and how you expect to achieve
them through academic research. Here, you might refer to your
tentative dissertation topic.
Reflection of Walden's Mission Statement
Discuss how Walden’s mission statement corresponds to your
own philosophy and goals. Be sure to demonstrate that you
have read the mission statement by using specific examples
from the statement itself.

12. Attainment of the Advanced Degree Related to Goals
Discuss how an advanced degree from Walden will help you
attain your goals. Why did you choose this university and/or
online environment above all others?
Part 2: Educational Background and Research Proficiency
In this section, discuss your academic and relevant personal
proficiencies. Consider using subheadings to separate different
sections of this part of your narrative. See the resources on the
Writing Center website for instructions on formatting APA
headings.
Academic Coursework in the Social and Behavioral Sciences
This is your chance to elaborate on your educational
background and competencies. You may choose to list in
bulleted form your most relevant courses.
Academic Coursework in Other Fields
Here you should elaborate on your educational background,
competencies, past research, relevant coursework, publications,
and other academic achievements. You may choose to list in
bulleted form your most relevant courses.
Professional Presentations, Seminars, Training, and Workshops
Discuss any training, skills, or other experience related to your
professional endeavors.
Volunteer Work
If relevant, discuss work you have done in your community that

13. has inspired your current course of study.
Past Research, Publications, and Teaching Assignments
If relevant, discuss past research you have been involved with,
along with any of your teaching assignments. If you have
published research in the past, list the publications.
Access to Research Materials
Describe the availability of databases, information technology,
and other research materials necessary for graduate study.
Think about local libraries, resource centers, and your
professional contacts to which you may have access.
Academic and Research Strengths and Weaknesses
In this section you should analyze the strengths and weaknesses
you bring to graduate study, the opportunities or assets you
have to help you, and any situations or conditions that may pose
a threat to your success. You should also give your faculty a
sense of how they may help you meet your goals, so give an
honest account of this analysis.
Conclusion
Wrap up this section with your perspective on your readiness
for graduate study.
Part 3: Plan of Study and Program of Study Form
Overall Learning Goals
Describe your goals for study at Walden, using as much detail
as you can at this point. How do you plan to use Walden’s
course offerings? What are your goals for the courses you plan
to take?Description of Coursework

14. Discuss your plan for taking courses here at Walden. Be sure to
browse through the course catalog, paying attention to the
differences among the courses and the content they will include.
Think about each course in your Program of Study (POS), and
spend some time here discussing what you hope to learn from
these courses.
We understand that your ideas will change and develop as you
move through the program, but we want you to get your creative
ideas flowing, identify reasons to spend more time with the
resources for your studies and in dialogue with other scholars
and fellow students, and be more prepared for your first
conversations with your Instructors.
References
(Please note that the following references are intended as
examples only.)
Alexander, G., & Bonaparte, N. (2008). My way or the highway
that I built. Ancient Dictators, 25(7), 14–31.
doi:10.8220/CTCE.52.1.23-91
Babar, E. (2007). The art of being a French elephant.
Adventurous Cartoon Animals,19, 4319–4392. Retrieved from
http://www.elephants104.ace.org
Bumstead, D. (2009). The essentials: Sandwiches and sleep.
Journals of Famous Loafers, 5, 565–582.
doi:12.2847/CEDG.39.2.51-71
Hansel, G., & Gretel, D. (1973). Candied houses and unfriendly
occupants. Thousand Oaks, CA: Fairy Tale Publishing.
Hera, J. (2008). Why Paris was wrong. Journal of Greek
Goddess Sore Spots, 20(4), 19–21. doi: 15.555/GGE.64.1.76-82
Laureate Education (Producer). (2007). How to cite a video:
The city is always Baltimore [Video file]. Baltimore, MD:
Author.

15. Laureate Education (Producer). (2010). Name of program
[Video webcast]. Retrieved from http://www.courseurl.com
Sinatra, F. (2008). Zing! Went the strings of my heart. Making
Good Songs Great, 18(3), 31–22. Retrieved from
http://articlesextollingrecordingsofyore.192/fs.com
Smasfaldi, H., Wareumph, I., Aeoli, Q., Rickies, F., Furoush,
P., Aaegrade, V., … Fiiel, B. (2005). The art of correcting
surname mispronunciation. New York, NY: Supportive
Publisher Press.
Updated September 2009 from the Walden Writing Center
PHY-102 Application Paper Guidelines
Overall Project Review
During this course, many concepts in the physical sciences will
be examined in detail. You will select an application, research
it, and write a 750-1,000 word paper on it. The following are
brief descriptions of the project tasks:
Task 1: Identify your topic and write a brief outline.
Task 2: Submit your final paper.
Possible Topics for the Application Paper
These are just ideas. You are welcome to pick another topic.
The purpose of Task 1 is for you to present your topic to your
instructor and receive feedback on your plans.
The physics of a sport (pick one)
The physics of a bicycle (or any other machine)
The physics of car accidents
The physics of flying
The physics of space exploration

16. The camera
The combustion engine
The air conditioner
The chemistry of an element (or an atomic group of elements)
Nuclear medicine
Application of radioactivity (pick one)
Plastic – production and properties
Waste water treatment plants
The chemistry of a pharmaceutical (pick one)
The catalytic converter
The workings of a smokestack of a factory or a power plant
The chemistry of fertilizers
The chemistry of preservatives
Application Paper: Task 1
For Task 1, identify an application of one or more concepts
from this course. A list of possible topics has been provided
above.
To successfully complete task 1, do the following:
1. Briefly describe the application. This could be the draft for
your introduction paragraph.
2. Provide a brief outline of the topics for each of the body
paragraphs.
Application Paper: Task 2
Using the work you completed in Task 1, write your application
paper, which should be 750-1,000 words.
Include the following:
1. An introduction.
2. A minimum of three body paragraphs each describing some
aspect of the application. Make sure to include how each aspect
relates to one or more concept(s) from this course. You may
choose to include the history of the application as one
paragraph.
3. A concluding paragraph.
4. You must use at least two scholarly sources in addition to the

17. textbook as references to support your paper. Make sure to
properly cite your sources.
Prepare this assignment according to the guidelines found in the
GCU Style Guide, located in the Student Success Center.
This assignment uses a rubric. Please review the rubric prior to
beginning the assignment to become familiar with the
expectations for successful completion.
You are required to submit this assignment to Turnitin. Please
refer to the directions in the Student Success Center.
© 2015. Grand Canyon University. All Rights Reserved.