PHYS 1415 lab 2
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Sanchez 1
Grace Sanchez
January 20, 2023
Professor Guanghua Xu
PHYS 1415
Lab 2.1 ; Rubber Band Car
Rubber Band Car Report
In this experiment, I used supplies such as rubber bands, cardboard, tape, bottle caps, etc.
to build a small car that is powered by the rubber band. When the rubber band is wrapped around
the axles it creates potential energy that will move the car once let go. In this report, we discuss
the function of the rubber band car more as well as our results and conclusion.
The rubber band car’s body is made of two 6 in x 4 in cardboard rectangles taped
together, a 1 in x 1 in, the square was cut out of the bottom of the cardboard to create room so the
axel is shown. This creates a space for the rubber band to connect to the axle. On the bottom of
the car, there are two straws taped to the bottom and top, this is for the axles. The straws allow
the axles to stay in place while being able to rotate. Then the wheel is connected to both axles so
the car rolls. What wheels are used can change your results for this experiment. A little piece of
wood was put on the right side up at the top of the cardboard to make a spot the hold the rubber
band. As briefly discussed above the rubber band wrapped around the axle creates potential
energy. This also means the more the band is wrapped around the more potential for the car to
move farther. The car’s right side is up, then hook the rubber band at the top point and wrap the
excess around the bottom axle and record your findings.
Sanchez 2
When making the car I had issues at first, I couldn’t get the car to go. The problem was
the wheels, I used bottle caps for the wheels when first placed on the bottom of the caps were
facing the car, when I turned the caps to face the outside the car started to work a little bit better.
I then added smaller rubber bands to each tire, this created traction between the wheels and the
ground. After making these adjustments to the wheels the rubber band can be successful. After
the first successful try the car traveled 3 ft. and 2 in. The next two tries stayed around that range
of distance as well.
After this experiment, I conclude that the tires make a big difference in a couple of ways.
If the tires aren’t placed in the axle straight the car won’t travel straight. The bigger the tire there
would probably create more traction, and more stability, which would contribute greatly to the
car’s success. Also how many times the rubber band is wrapped around the axle contributes to
how far the car will travel.
Table;
Tries
Distance
1
3 ft 2in
2
4ft
3
3ft 6in
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Related Questions
ECO
5. AUTOMOTIVE. The power an
engine produces is called
horsepower. In mathematical
terms, one horsepower is the
power needed to move 550
pounds one foot in one
second, or the power needed
to move 33,000 pounds one
foot in one minute. Power, in
physics, is defined simply as
the rate of doing work. The
formula below gives the
horsepower at 5,252 radians
per second.
https://philkotse.com/toyota-corona-ior-sale-in-baguio/1991-for-sale-in-aid7017151
625T
1313
where H is the horsepower and T is the torque
a. Find the inverse of the model.
b. If a taxi produces a horsepower of 200, what is the torque it generates?
Solve here:
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XYZ Company Ltd has consulted your firm Zig-Zag Energy over an intention to generate electricity in Ghana. Being the senior project engineer for Zig-Zag Energy, management has asked you to prepare a detailed technical report in respect to the project.
a) Discuss the major factors to take into consideration when consulting on such projects.
A tank containing air is stirred by a paddle wheel.
The work input to the paddle wheels is 2000KJ and the heat transferred to the surrounding from the tank is 6000KJ.
b) Determine the change in the internal energy of the system
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account_circle
Science
PhysicsQ&A LibraryA child’s toy consists of a m = 31 g monkey suspended from a spring of negligible mass and spring constant k. When the toy monkey is first hung on the spring and the system reaches equilibrium, the spring has stretched a distance of x = 17.6 cm, as shown in the diagram. This toy is so adorable you pull the monkey down an additional d = 7.6 cm from equilibrium and release it from rest, and smile with delight as it bounces playfully up and down. 1. Calculate the speed of the monkey, ve, in meters per second, as it passes through equilibrium. 2. Derive an expression for the total mechanical energy of the system as the monkey reaches the top of the motion, Etop, in terms of m, x, d, k, the maximum height above the bottom of the motion, hmax, and the variables available in the palette. 3. Calculate the maximum displacement, h, in centimeters, above the equilibrium position, that the monkey reaches.
A child’s toy consists of a…
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1. For your science fair project, you decided to design a model rocket ship.
The fuel burns exerting a time-varying force on the small 2.00 kg rocket
model during its vertical launch. This force obeys the equation F= A + Bt2.
Measurements show that at t=0, the force is 25.0 N, and at the end of the
first 2.00 s, it is 45.0 N. Assume that air resistance is negligible.
a. What are the forces acting on the rocket?
b. Draw its free-body diagram.
c. Find the constants A and B, including their SI units using this
equation F= A + Bt².
d. Find the net force on this rocket and its acceleration the instant after
the fuel ignites.
e. Find the net force on this rocket and its acceleration 3.00 s after fuel
ignition.
f. Suppose you were using this rocket in outer space, far from all gravity.
What would its acceleration be 3.00 s after fuel ignition?
g. What is the rocket's mass in outer space? What is its weight?
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February 7,
2021
H.W MECHANICS PHrsics
Example 5.13 Friction in horizontal motion
You want to move a 500-N crate across a level floor. To start the
crate moving, you have to pull with a 230-N horizontal force.
Once the crate "breaks loose" and starts to move, you can keep it
moving at constant velocity with only 200 N. What are the coeffi-
cients of static and kinetic friction?
Example 5.15 Minimizing kinetic friction
In Example 5.13, suppose you move the crate by pulling upward
on the rope at an angle of 30 above the horizontal. How hard must
you pull to keep it moving with constant velocity? Assume that
H = 0.40.
Example 5.16 Toboggan ride with friction I
Let's go back to the toboggan we studied in Example 5.10. The
wax has worn off, so there is now a nonzero coefficient of kinetic
friction 4. The slope has just the right angle to make the toboggan
slide with constant velocity. Find this angle in terms of w and Hg.
Example 5.17 Toboggan ride with friction II
The same toboggan with…
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engineering dynamics
1. A car moving at 70 km/hr has a mass of 1700 kg. What force is necessary to decelerate it at a rate of 50 cm/s^2?
2. An elevator weighing 3,000 lb attains an upward velocity of 20 fps in 4 seconds with uniform acceleration. What is the tension in the supporting cables?
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3. An athlete pushes against an exercise machine with a force that varies with time according to
F(1) = 1200 N (1 – kf), where k = 8 s?
Also, the velocity of the athlete's legs acting in the same direction as the force acts according to
v(t) = 7 m/s² t
a. Create a computer generated plot of the power as a function of time.
b. Find the maximum power the athlete generates and the time at which maximum power is
generated.
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Part 1: Do the Analysis of the Ocean Thermal Gradient Power Plant shown
below. Your Analysis will be easier to do in EES but it is up to you. Your
EES program must be well documented and documentation in your code
should reference system sketches. (The cycle and individual components)
These sketches are done on attached engineering or typing paper, unless
you are able to draw them in EES. You must validate your results with hand
calculations on engineering paper that invoke the 1 and 2 Law from the
perspective of the entire cycle, not the individual components. Of course,
a system sketch is required.
nd
1. An ocean thermal gradient power plant using a simple non-ideal Rankine
Cycle operates with a peak boiler temperature of 70 °F and a condenser
temperature of 40 °F. The warm surface water of the ocean is supplying
the thermal energy to the boiler. Assume a high source temperature of 80
°F. The cooler water deeper in the ocean is the sink for heat rejection at
the condenser. Assume a…
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mechanical engineering works that can be related to algorithm
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1)sketch of the problem including everything?
2) 3 laws and principle in this problem?
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Definition, diagrams, equations, & sample problems
合
Test Your Skills 14.1
2. A substance undergoes a polytropic process where n = 1.4. If the final pressure is twice as large as
the initial pressure and the initial temperature is 264 K, find the final temperature in K.
Your answer
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, the volume of gas holder is 2.2 m3
and the retention time is 22 days. Find the height
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Recall the discussion on spacecraft from the chapter opener. The following problems consider a rocket launch from Earth’s surface. The force of gravity on the rocket is given by F(d)=−mk/d2, where m is the mass of the rocket, d is the distance of the rocket from the center of Earth, and k is a constant.
172.
As the rocket travels away from Earth’s surface, there is a distance D where the rocket sheds some of its mass, since it no longer needs the excess fuel storage. We can write this function as F(d)=⎨(−m↓1 k / d^2) if d < D
(−m↓2 k / d^2) if d ≥ D
Is there a D value such that this function is continuous, assuming m1≠m2?
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A group of twenty executives attend a board meeting in a room that measures 20 feet by 20 feet and has a 10-foot ceiling. Suppose each person occupies 2.5 feet and gives out about 375 BTUs of heat per hour. Calculate the temperature rise that occurs within 20 minutes of the start of the conference if the room is completely sealed and insulated, Take c for air as 0.1825 BTU / Lbmd Ibm ° F.
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the winter.
You are outside on a cold day. The air temperature overall is around 5° C; assume your skin
temperature is 16° C
a) If you stay outside for a while and there is no wind, the air around you will eventually increase in
temperature past 5° C. Explain why the air heats up, using the idea of conduction.
b) What is the highest temperature the air around you can reach? Explain.
c) As the air around you warms up, explain why you start cooling down more slowly.
d) If the wind blows, convection happens: the warm air around your body is blown away, replaced
by more 5° C cold air. In this case, will you cool down more quickly or more slowly? Explain.
e) Explain why the "wind chill" temperature (ie, the temperature it feels like when the wind is
blowing) is colder than the actual temperature of the air.
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You are a student at the HTU University, the instructor of the fundamental of thermodynamic course
asked you to explain the fundamentals of thermodynamic systems to Grade 10 school students to
help them visualize the importance of thermodynamics in their life starting from their car engine
and moving to the different appliance that they use in their home, discuss the following with school
students:
Q1. What does thermodynamics mean and represent? Give examples from your daily life.
Q2. What is a thermodynamic property? What is the difference between intensive and extensive
properties. Why the density is an intensive property; it is dependent on mass and volume which are
extensive properties, right?.
Q3. What is the difference between energy and heat transfer? Give examples on both.
Q4. What does the first law of thermodynamics state? Give two examples on the first law of
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Q5. Write down the equation of energy balance for closed, open, and…
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1%EA I.
docs.google.com/forms/d/e/1FA O
* For figure below, the tension in the cable is
0.25 m
25°
B
0.5 m
- 0.12 m
1.5 m
14. &N
5 m
23.5
29.5
25.5
27.5
صفحة 1 من 1
إرسال
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A solar panel is mounted on the roof of a house. Fig. 4.1 shows a section through part of the
solar, panel.
4
sunlight
trapped
air
copper pipe,
painted black
water
glass sheet
insulating
metal backing sheet,
painted black
material
Fig. 4.1
A pump makes water flow through the copper pipes. The water is heated by passing through the
solar panel.
(a) Select and explain three features of the solar panel that maximise, the final temperature of
the water.
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Problem
A person is doing leg exercises where a 100N weight linked via a pulley is
attached to their heel. Based on a simplified system in which the quadricep muscles are the only active
muscle group and can be modeled as a single muscle tension, what is the muscle tension and joint
reaction force at the knee necessary to maintain this position. You can assume the quadriceps is
attached to the tibia 5 cm below the knee, making a 15° angle with the horizontal. The weight of the leg
is 120 N and the center of gravity is 0.35 m from the knee joint, and the length of the leg is 0.8 m. Make
sure to draw a FBD of the lower leg.
100N
Fm
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force to generate electricity. Wind power is an alternative to burning fossil fuels, and is
renewable and produces no greenhouse gas emissions during operation.
Modern horizontal-axis wind turbines often use three blades. Theoretically, the
maximum power P (unit: watts) that a three-blade wind turbine can extract from the
wind power can be calculated as:
P = pAv³C₁.
. (Equation 1)
where p is the air density (kg/m³), A is the sweep area of the turbine (m²) and can be
calculated from the length of the turbine blades, and v is the wind speed (m/s). Cp is
the power coefficient that is unique to each turbine type. This coefficient represents
the amount of kinetic energy from the wind that is captured by the turbine. From the
Betz's limit law we know that the best power conversion possible is Cp,max = 0.59.
Part 1
Given the following data:
Blade length /= 50 m
Air density p= 1.5 kg/m³
Power…
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Your final answer should be in minutes (rounded to the nearest 10 minutes).
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2. (Inspired by a walk in Baker Student Center.) An escalator handles a steady load of 30 people per
minute taking them from the first to the second floor through a vertical rise of 24 feet. Let us say the
average person riding the elevator weighs 160 lb.
a. What output power on a motor do you require to drive the unit? Take literally one minute to
find an electric motor online that could do this job. You can search “_ hp electric motor"
and state the motor name, power, cost, and vendor. Of course, round up your hp, not down to
meet your specs. (In practice, this is an area where you can spec the motor in equivalent
Watts, if you choose.)
b. What is the electric power that is input to the motor considering losses within the escalator
system due to friction, vibration, etc.? Your chosen motors surely have a different efficiencies
and sources may even present efficiency as a function of power/rpm, so let's all use the value
of e= 0.85 for consistency.
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competition: who can build the fastest swimming "robot". The robot should be very
rudimentary: the body should be a simple potato and both friends are only allowed to
add a propulsion mechanism at the end.
Alex is a big fan of fish, and therefore bases his robot's swimming mechanism on the
tail of a fish: He attaches a paddle to a motor, which rapidly changes the angle of the
paddle from side to side.
Barbara, on the other hand, was inspired by flagellar propulsion and decided to attach
a corkscrew to a motor which rotates it along its axis, as depicted.
Alex
Barbara
a) If the race is done in water, who should win the race? Explain.
b) If the race is done is honey, who should win the race? Explain.
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ue 9:E0
• ZAIN IQ lI.
۱۳ شباط
تحرير
QI: Find the result of F4 Force acting on a body as shown below:
400 N
300 N
60
30
F;= 150 N F,- 260 N
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The crux of the problem asks you to compute the elastic modulus of a pancake--for this we give you numbers that we got from our own measurements of the pancakes. The last question asks you to hypothesize about which ingredients are playing the role of flour in the gluten free recipes. If you find this topic interesting, you may want to consider exploring something like this for your final project, and design an experiment to understand the difference between the normal and gluten free recipe and try to manipulate the gluten free recipe to better resemble the normal pancakes.If you choose to make the two recipes and compare them in your own kitchen, make sure you use exactly the same protocol for each recipe: In our trials, we made the batter, and then cooked on a skillet, using 1/4 cup of batter per pancake, and flipped when the edges were firm and golden, about 4-5 minutes on each side.Consider a stack of six pancakes. Each pancake is made of 1/4 cup (approximately 60 mL) of batter,…
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