Science
Tulsa Community College Nerf Launcher and Kinetic Energy Engineering Report

Tulsa Community College

Question Description

Please rephrase everything in this Engineering Report attached below. Please make sure you at least understand what's on there. Using the rephrasing tool is not acceptable and the same with changing synonyms. Rephrase everything possible for plagiarism purposes. ONLY CHANGING WORDS IS NOT ACCEPTABLE. Not going through the requirements will waste your time and mine. Please make it simple and understandable.

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Introduction: The big idea behind this Design Project #2 was to work as a group with Senior Design teams assigned prior in the semester where each teammate will be responsible to build a nerf launcher responsible for launching a nerf ball in a setup similar to a football field. This device must convert the energy from 5 pound sandbag that fell down vertically within 6 feet into kinetic energy of the football. Each team has to make its sandbag. The basic rule to follow in this project is that the first teammate will start on the start line of the football field and using the launcher, launch a nerf ball into the football field where the next teammate will be standing to catch the ball with in order of the teammates until they arrive the end of the specific field length. If any of the teammate couldn’t catch the nerf ball the next teammate starts in the same point where his teammate was launched the nerf ball not where the ball fell down. Every team has to do same way to go back to the start line. Team with less number of launches will win the competition. There were Engineering specifications that we had to follow: • The device must be completely safe as it is very important. • The device shouldn’t be expensive coast and heavy weight. • The device has to be at the rest for launching the ball so the energy should come through the sandbag. • If any device fails and falls apart during the middle of a competition, no repairs can be made to it. Also, if it cannot be used during the competition to launch the ball, it will be counted as an incomplete pass. • Each team’s journey will be timed when it’s going down the field. This will be useful to break a tie if the launches’ numbers are the same. • As there are a lot of teams, and the football field can only have six of the teams so the other teams’ leaders will count and time for one team of the competitor teams. • Aesthetic appeal also counts towards the grading of individual performances and things such as appearance, ease of operation, and durability are important. • Safety is the extremely important thing to keep in mind. The device should be completely safe to operate so that it does not hurt teammates or spectators. Three Feasible Alternative Design Concepts: The first Alternative design is to design rectangle shape of PVC pipes with two vertical PVC pipes that locate in the middle of the PVC rectangle. The rectangle sides are connected by elbow. The length should be 40 inches and width should be 20 inches. The two vertical pipes with 20 inches length are connected by threaded rod with 25 to 30 inches length. In the middle of the threaded rod, PVC pipe with 40 inches length should be in the middle so the front side is the same back side of the PVC pipe that will use the front side to post the ball on a piece of wood on it and the back side to drop the sandbag on it. This is the picture of this idea: The second alternative design is to design square shape of wood that has the same length and width (20 inches) with 1 inch for thickness for the base and top of the square. All sides are connected by nails. Making two pieces of wood with length 10 inches and 1inch of thickness vertically on the top of the square. The two pieces are connected by threaded rod in the middle of them with length of 10 inches. On the opposite side of the top of the square make a piece of wood with length of 1inch and width of 1inch that stand the PVC pipe. The PVC pipe with 20 inches length and one inch diameter is going through the threaded rod to be on the stand which is on the opposite side of the top square. The ball can be posted on a piece of wood that tied to the end of the PVC. Drop the sandbag on the end of the PVC pipe and the ball on the other end of PVC on the plate as in the picture. The third alternative design is to lend two steel pipes with 90 degree in the middle of the steel pipe. The length should be 30 inches for both of them. Connect the lending area by threaded rod with 10 inches of length. Putting the PVC pipe with 10 inches through the threaded rod. On one of the end of the PVC pipe tie a plate to post the ball on it. On the other end of the PVC pipe drop the sandbag as in the picture below: Description of My Design: My design consists of two pieces of wood with 20 inches length and1inch of thickness as basis with two pieces of wood with 27 inches length and 1 inch thickness connected vertically to the middle of the two wood basis by nails. On the top of the two basis pieces, by nails I connected a piece of wood with length of 15 inches with thickness of 1inch because I need to connect another piece of wood with length of 17 inches with 1inch of thickness that will stand the end of the PVC pipe where the ball launching. The vertical two pieces are connected to each other by threaded rod. The threaded rod was post about 8 inches down from the top of the vertical two pieces. PVC pipe with length of 25 inches and diameter of ¾ inches goes through the threaded rod which is almost in the middle of PVC pipe. The threaded rod was tied by bolts on both sides of the vertical pieces of wood. Also the PVC pipe was bordered by bolts on the both side of thread rod. I taped a cup on the end of the PVC pipe to post the ball on it. On the other end of the PVC pipe where the sandbag dropped. Using nails the vertical two pieces of wood were connected to each other by another piece of wood that deter the PVC pipe to go over 80 degrees. The following image is my design Engineering Analysis: Velocity of sandbag = √2𝑔ℎ Force = ma Velocity of the ball = ((work- mass of ball *h*g)/(0.5*mass of ball))^0.5 R = ((velocity of ball)^2/g)*sin(2 theta) By doing calculation I got the force 161 Ib.ft/s^2 and the ball velocity 14 ft/s and the distance that the ball traveled by the force is 27 feet and the impact velocity 19.7 ft/s Aesthetic Appeal: The device was cool looking because it was simple construction. It was hard honestly to make it look good because of the length of the pieces of the wood that I used to design it. It was working easily and fast to launch the ball because there were no heavy parts used to build it. It was durable enough to endure all the launches without any problems because all the parts are tied to each other’s carefully. Safety Features: It was told in the introduction of this report that safety is very important. It was kept in the mind while the construction of this device. There were no moving parts of the device because all of the parts were tied to each other’s. It was not at all risky to use and operate this device because it had small design and easy to move. The safety of people who were watching the competition was also considered and the device was tied very well and the nerf ball was very light weight so they were safe and not at any harm. When I make this design, I used the machine to cut the pieces of the wood however I was using all safety equipment. Also, when I used the drill for the nails, I followed the safety procedure so I didn’t harm myself or others. Conclusions and Recommendations: It was fun to build this design however it took hours to finish it. To be able to make different designs before you finally selecting the best one was challenging and nice. As it is the first design, mistakes can happen. For my device, it launched the ball around 23 feet. The distance was good however the accuracy can’t be exactly the same every time I launched the ball which I think because of air. To get more 23 feet for my device, I suggest the PVC pipe should be less than that I used because it will help the ball to go more distance. Parts list: Part Number 1 2 3 4 Description Pieces of wood Threaded rod PVC pipe cup Quantity 7 1 1 1 ...
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Final Answer

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CLASS

NERF LAUNCHER
SENIOR DESIGN PROJECT #2

By Student’s Name
Course + Code
10 November 2019

INSTITUTION

TABLE OF CONTENTS

List of Figures ................................................................................................................................. 2
List of Tables .................................................................................................................................. 2
Introduction ..................................................................................................................................... 3
Design Concepts ............................................................................................................................. 4
First Alternative Design .............................................................................................................. 4
Second Alternative Design .......................................................................................................... 5
Third Alternative Design ............................................................................................................. 6
Design Description.......................................................................................................................... 7
Design Analysis and Calculations .................................................................................................. 9
Aesthetics and Machinability........................................................................................................ 10
Safety Features .............................................................................................................................. 10
Conclusions and Recommendations ............................................................................................. 10
List of Materials ............................................................................................................................ 11

LIST OF FIGURES
Figure 1: First alternative design (rectangular-shaped) .................................................................. 5
Figure 2: Second alternative design (square-shaped) ..................................................................... 6
Figure 3: Third alternative design ................................................................................................... 7
Figure 4: A photo showing all the components of the designed nerf launcher............................... 8

LIST OF TABLES
Table 1: List of material required ................................................................................................. 11

Introduction
This paper encloses a comprehensive design project prepared by all the group members
with the objective of designing a nerf launcher. The main aim of this project was to come up
with a nerf launcher to be used in a competition with other teams. In principle, the nerf launcher
is expected to convert the potential energy of a 5-pound sandbag into kinetic energy as it falls
from a height of 6 feet to the device launching the attached ball.
In the proposed competition, each team was to design its own nerf launcher in addition to
making its own sandbag. The basic rule is that every team starts from the start line and then
launches a nerf ball to the next teammate who is expected to catch the ball. Any miss of the ball
calls for a relaunch and the team with the least number of launches to the finish line is considered
the winner of the competition.
The engineering requirements and specifications in this activity are as listed below;


The device should be safe to use and operate.



The device should be economical in cost



The device should be lightweight and flexible in design



The device should be at rest prior to the launch to ensure that the energy only
originates from the sandbag.



No repairs are allowed, if a device malfunctions during the competition. Failure
to launch the ball will be counted as an incomplete pass.



In the case of similar numbers of launches, the tied teams’ journey times will be
used to break the tie.



Since the football pitch can only field six teams, other team leaders are expected
to time and count the number of launches for at least one team of the competing
teams.



The design aesthetics are also important in the final grading of the students’
performance. For this, factors such as ease of operation, durability, and
appearance play a ve...

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UIUC

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