# What is Swing: Definition and 184 Discussions

Swing music is a form of jazz that developed in the United States in the 1930s and 1940s. The name came from the emphasis on the off–beat, or weaker pulse. Swing bands usually featured soloists who would improvise on the melody over the arrangement. The danceable swing style of big bands and bandleaders such as Benny Goodman was the dominant form of American popular music from 1935 to 1946, known as the swing era. The verb "to swing" is also used as a term of praise for playing that has a strong groove or drive. Notable musicians of the swing era include Duke Ellington, Benny Goodman, Count Basie, Cab Calloway, Jimmy Dorsey, Tommy Dorsey, Woody Herman, Harry James, Lionel Hampton, Glenn Miller and Artie Shaw.

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1. ### B Slack vs tight rope at the start of a pendulum

Pretty much what the title says. Everything that I can find online addresses the pendulum problem with the assumption that the rope is under tension to start. What if the rope is slack to start? Will there be an increase in force applied to the pivot point, say if a mass is dropped off a...
2. ### Carnival Swing Question, I am severely stuck

I found the x and y components and then divided the two equations to see if I can solve for the angle but that did not work. I have been at this for two hours, please help me.
3. ### Engineering Source impedance using given voltage swing and power

Hi! I normally have a pretty good grasp of what the source and load impedance for these types of problems; however: This textbook is giving me peak to peak voltage swing 6V33 and 1 W of power. I'm a little bit confused at converting this into an input impedance and am worried I'll be off by a...
4. ### Comparing Energy and Movement on a Swing and Water Slide

¿Cómo es la calidad de la acción y la variación de la energía y el movimiento, durante el desplazamiento, cuando se usa un columpio y un tobogán de agua? [Translated by a Mentor using Google Translate]
5. ### Understanding of Wave swing physics

Yeah, as I said, i have no idea why we can assume beta to be the same for any position at given alpha.
6. ### B Sinusoidal force mechanism for a swing

Hi, Please have a look on the attachment. The displacement of swing from the equilibrium position, x=0, is considered to be maximum, +x, when the swing reaches the person who is pushing it. The pushing force is of short duration and could be approximated by a pulse. I hope I have it correct...
7. ### I Predicting Motion of a Swing on a Non-Horizontal Branch

A swing is suspended from a non-horizontal tree branch. Points C and D are fixed in space. All 4 line segments in the diagram have constant distance. After some initial "kick" imparts energy to the system the only force acting externally on the system is gravity. Is it possible to predict the...
8. ### Voltage Swing for NMOS: Digital ICs by Jan M. Rabaey

Ref: Digital Integrated Circuits by Jan M. Rabaey I have trouble understanding two things: 1) Why will x charge to Vdd - Vtn1 and why not Vdd? 2) If x in left charges to Vdd - Vtn1, then in right also it would charge to Vdd - Vtn1... so Vy would charge to Vdd - Vtn1 - Vtn2... so why have they...
9. ### Why is there no r^2 term in the formula for the swing weight of a golfclub?

The Swing Weight of a golfclub = m * (r - 14) m = mass of the club in grams r = distance from the top of the shaft to the center of mass of the club in inches 6050 equals the swing weight D-0 But the formula for the angular acceleration of any object spinning around an axis is: ωdot = τ / I In...
10. ### A Inverted pendulum car - pedulum will not swing

Dear Community, I am trying to implement the inverted pendulum cart simulation. To do so I’ve used the equation system 5 published here http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.619.551&rep=rep1&type=pdf I've solved the equation by left hand multiplication with the inverse which...
11. ### B Feasibility of a L1 Gravity Swing Cold Launch?

At an L1 LaGrangian point between two bodies, one could - materials science notwithstanding - pit two of Newton's Laws (LM3,UG) against each other to provide thruster-free stationkeeping. Would it be feasible to use that to launch free from the system ? either spit out like a watermelon seed...
12. ### EMF Oppsition in Adjacent Wires +/- Swing

Can someone please help with this thought experiment? I have sought advice elsewhere but it remains unclear to me. I have a straight piece of two conductor "figure eight" wire (like speaker wire or US power cord) laid out left to right. I connect the output from a push-pull type audio...
13. ### A small mass m hangs from a thing string and can swing....

Homework Statement a small mass m hangs from a thing string can swing like a pendulum. You attach it above the window of your car as shown in the figure. When the car is at rest the string hangs vertically. What angle does the string make? a) when the car accelerates 1.20m/s^2 b)when the car...
14. C

### B How should I express this angle in words?

Hi! The diagram above is showing a man swinging a swing (a facility you can find in playgrounds) back and forth. I'm trying to come up with a concise expression in words that describes the angle noted as theta so that I can write a clear and effective research question (theta is the independent...
15. ### Are These Physics Questions Correct in English and Science?

hi, we are a few non-native English speaker physics teacher and we wrote some questions for an assessment book but we can't be sure about this two similar question. a) are they accurate for rules of English, are we use correct terms is there a necessary change? b) are they accurate for rules of...
16. N

### Equation for Swing Leg Angle: Supporting 25 lbs in a 180 Arch

I need help with an equation for the angle of the legs of a swing. I am building a swing. It is only 4 feet high, it is an indoor apartment swing for my son. I would like to know what the minimum legs angle would need be to support swinging 25 pounds in a 180 (probably less) arch. And if I...
17. P

### Is There Such Thing as a Swing Set That's Too Tall?

I plan on building a swing set for my daughter, and I always loved the feel of a good tall swing. I like the long range of motion, the nice glide ... but is there such thing as too tall? I was planning on going about 14' off the ground with the cross beam .. then I figured, well, let's go with...
18. ### Reaction force be 0 at top of circular path swing?

Homework Statement Hi, I have a question about a bucket filled with water being swung in a vertical circular path. I'm wondering why at the top of this swing, the reaction force of the bucket on the water can be 0? (ie. why is the minimum centripetal force required only the weight of the...
19. ### Velocity, momentum and energy values for a Pendulum swing

Homework Statement This is my 'carrying out a practical investigation' assignment for Maths. I've attached the coursework (what I've wrote up to now) and my main concern is whether I've got the right differential equation to find 3 new velocity values throughout the pendulum trajectory...
20. ### What's the Velocity at the Highest Point of a Swing?

So currently I'm stuck in a topic which I don't understand because either my teacher is doing wrong or I'm just blind to see my mistake I want to know the velocity of a object at the highest point in a swing (looping is the German word, I'm not sure if it's the same in English) (I don't know...
21. ### Girl on a swing, find tension and force

Homework Statement The girl weighs 30kg and her COM is at G. As she is passing the lowest position of the swing with rope length L=4.5m her speed is 3.6m/s. The swing and rope have no mass. Calculate a) the tension in the rope b) the force P that is aligned along the girl's arms see the...
22. ### Swing Torque: Tension in Chains for Boys & Girls

Homework Statement A 355.0N boy and a 300.0.0N girl sit on a 50.5N porch swing that is 1.5m long. The swing is supported by a chain on each end. What is the tension in each chain when the boy sits .35m from one end and the girl sits .45m from the other? ( ans: boys side = 390 N, girls side =...
23. ### How to stop a swing from spinning?

I am hanging an indoor swing. The swing hangs from ropes and the ropes are attached to a single chain hooked into the ceiling. I want the swing to "swing back and forth" but I do not want the swing to "spin" around -- I want it to face in one direction. Is there something I can do to stop the...
24. ### Java How to add elements in a Java swing List Box

Hi, I am using NetBeans 8.1. I want to add elements in a list Box on a Button press. My code would read text from textField & then insert into list box: private void button1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your...
25. ### Java Java GUI Development: SWING vs. Other Libraries

Dear friends! Please explain me what API/Libraries uses in Java for create graphic user interface. I use SWING but I hear that SWING is oldest technology. What you uses?

27. ### Find tension in cables supporting giant swing

Homework Statement Picture a seat that is supported by two cables. One is horizontal, and the other makes an angle of 40 degrees to the vertical. The swing swings in a horizontal circle at a rate of 32 rev/min. The horizontal cable is 7.5 m long. The person sitting on the seat at the end of the...
28. ### Swinging, equilibrium, kinetic energy problem

Homework Statement This is a more than one part question that depends on answers from the previous parts, which I have so I will not rewrite those questions. I will write the question I am facing difficulty with: Answers from previous parts: Length = 1.95 m (From top of chains to center, its...
29. ### How hard must you hit a rod for it to swing up 180 degrees?

Homework Statement A thin rod, 0.79 m long, is pivoted such that it hangs vertically from one end. You want to hit the free end of the rod just hard enough to get the rod to swing all the way up and over the pivot. How fast do you have to make the end go? Homework Equations P(change in...
30. ### Solving Giant Swing Horizontal Cable Tension

1. Homework Statement In one of the versions of the "Giant Swing", the seat is connected to two cables, one of which is horizontal (Figure 1) . The seat swings in a horizontal circle at a rate of 33.0 rev/min . If the seat weighs 295 N and a 869-N person is sitting in it, find the tension in...
31. ### Pendulum - Maximum Angle in 2nd half of swing

A simple pendulum, 2.0 m in length, is released by a push when the support string is at an angle of 25° from the vertical. If the initial speed of the suspended mass is 1.2 m/s when at the release point, to what maximum angle will it move in the second half of its swing? Let h1 be the...
32. ### Centrifugal Force: Balancing a swing bucket rotor

A lab mate and I got into a discussion on how to properly balance a swing bucket rotor. This is different than a normal centrifuge in that there are buckets that swing out once spinning begins. In a standard centrifuge balancing is simple - it's just the same weight directly opposite your...
33. ### Calculate angle of swing in a carousel

Hello, this problem has given me headaches for days 1. Homework Statement The diameter of a carousel is 15 m and it rotates 8,0 rounds per minute. Calculate how large of an angle is formed with respect to the vertical plane by the swing that hangs by the ropes fixed to the edge of carousel...
34. ### Why Does My Swing Chair Keep Spinning?

Hi, I would like to get some help from you physics experts to solve this problem I am facing in my backyard. Here is the swing I have created using a hanging chair tied to a 23 feet high branch with a 1/4" aircraft cable made of steel strands. Problem: When the chair is empty it stays in one...
35. ### Where is the best place to push a kid on a swing?

My teacher told us to push a kid the highest on a swing, that you want to push on the bottom of the path. I am not sure why this is the case, obviously you wouldn't want to push against the kid. But it seems to me that as long as you were pushing on the downward swing it shouldn't matter...
36. ### How Does Standing Up Affect the Swing Period of a Child?

Homework Statement Question: If a child gets up from sitting position to standing while swinging, how does the period change? Homework Equations Period of a physical pendulum: T = 2π√(I/mgL), where I is the moment of inertia and L is the distance between the pivot and center of mass Period of...
37. ### The Secrets of Achieving Greater Swing Height in a Playground

Hi i was just wondering how a person who sits in a swing and starts of with a small motion, and is able to achieve a great swing height just by his body movements? How is one able to do this? Does his muscle contractions give additional potential energy being converted to KE to achieve a greater...
38. ### Calculating Tarzan's Max Swing Speed

Homework Statement Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1500N on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? His mass is 85kg; the vine is 4.0m long Homework Equations...
39. ### Calculating Tension when you swing a ball around a piece of string

Homework Statement You swing a ball around a piece of string(vertically). M = 0.150kg r= 1.10m Calculate the Tention at the bottom of the arc assuming velocity is twice as fast. Homework Equations When I do the problem I'm not sure how to set up the NetForce = ma How do which force is...

41. ### Force needed to open 1000 lb swing arm

Hello: I am working on a machine for a non-profit to build homes in developing countries. I have laid out the basic machine concept and then became stuck trying to figure out how to open the 1000 lbs machine with only manual labor. The machine sits generally vertical with the opening side...
42. ### Why do humans swing their arms while walking?

I have read a number of answers to this question. All have answers like it helps us keep balance etc. . . But there can be a very fundamental reason. Humans evolved from apes. Our ancestors used to walk on on four legs. If we observe a four-legged animal, it walks moving its limbs alternately...
43. ### Maximum angular velocity from a swing carousel

The problem is to find out the maximum angular velocity that the swing carousel can spin at before the chain holding the passenger breaks. The maximum tension that the chain can withstand is known (T). The radius from the centre of the ride to the chain when stationary is known (r). The...
44. ### Potential and Kinetic Energy on a swing as well as Tension in the rope

Homework Statement A 23.0 kg child plays on a swing having support ropes that are 2.10 m long. A friend pulls her back until the ropes are 41.0-degrees from the vertical and releases her from rest. a.)What is the potential energy for the child just as she is released compared with the...
45. ### Swing velocity at highest point

Homework Statement A swing is rotates with the distance 5m to the center of rotation. A full 360 degree rotation is possible. Find the minimal value of the velocity at the highest point, so that the person operating the swing doesn't fall. Given data: r = 5m Homework Equations Downward...
46. ### Child's Play-How high was the swing?

Homework Statement A swing is on a rope that is 3.0 m long. The swing is 1.1 meters above the ground at its lowest point. Find its height above the ground when the rope makes an angle of 34 degrees with the vertical. Homework Equations tan=opp/adj The Attempt at a Solution...
47. ### Converting baby swing from battery power to DC adaptor.

I have a fisher price baby swing. It has 4 1.5v batteries of size D. I tried to convert it to a 6v DC charger but that didn't work. The charger specification is output=400mA 2.4VA. If someone can help me please to find a right charger as this doesn't work correctly and swing does not swing as...
48. ### Man swing from on a rope (velocity)

Homework Statement A man standing on a 15 m high cliff tries to swing on a 12 m rope and let's go at 30° of the horizontal (travelling 150°). He let's go and travels through the air, to then land on the ground. What is his distance from his landing spot to the base of the cliff...
49. ### Solve 2 Block Swing Homework: Find Mass m

Homework Statement A box of mass M is at rest on a horizontal table. The coefficient of static friction between the box and the table is k. The box is connected by a taut string to a block of unknown mass m , initially held horizontally as shown and then released. The box begins to slide at...
50. ### Solving Johnny's Swing Height Puzzle: Can You Get 1.4 Meters?

Homework Statement Johnny is swinging (on a swing) at a velocity of 4m/s when he is 56 cm above the ground. What is his maximum height? Johnny is 45 Kg. Homework Equations Pe = mgh Ke= (1/2)(m* v^2) Total energy= Pe + Ke The Attempt at a Solution I tried setting the Ke equal to the Pe...