Turning Definition and 309 Threads

to find the moment of force X about A,is the working 20x1.4=0.8X X=35Nm clockwise. and what does it mean when the question asks "what is the minimum force X that must be applied in order to stop the door from turning?" does that mean it has to be in equilibrum?

Hi folks, my first post here, looks like a very helpful website though, so i thought i'd share my problem. I'm a mechanical engineering student working on a vehicle that has a zero turning radius system, which is to say (for the purposes of this problem) that it's controlled by 2 drivewheels...

[SOLVED] Torque: Turning Heavy Door with "Steady" Force Homework Statement Hello. The question reads, "...This is the world's heaviest hinged door. The door has a mass of 44,000kg, a rotational inertia about an axis through its hinges of 8.7X10^4 kg*m^2, and a width of 2.4m...

And what is the process called? Say you have a bunch of data you've collected plotted on a graph, what level of math teaches you to convert this data into a formula that you can play with? I'm in calc 2 right now and we just covered volumes. It's AWESOME! I'm not much of a higher level...

[SOLVED] potential energy and turning points Homework Statement A block slides on the frictionless loop the lopp track shown in this img, what is the min height at which it can start from rest and still make it around the loop The Attempt at a Solution I haev solved this problem TWO ways...

Homework Statement This is a really easy one, goodness only knows why I can't think of how to do it, here goes " Explain why a photon in free space cannot turn into an electron-positron pair." Homework Equations I assume E^2- P^2 = 0 will be of some help The Attempt at a...

Turning pie & sqrt into... I am desperately need help how to turn pie and sqrt to fraction? Here is my question, punch in sin(pi/4) and the answer would be .7071067812 I know how to use fraction mode I'm no noob. I tried that feature and it didn't works. Any brilliant idea would be...

Man slowly turning into a "tree" I hope you have a strong stomach for this one Watch the videos. http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/11/12/wtree112.xml I feel bad for that guy for being cursed for life.

Homework Statement A concrete highway curve of radius 80.0 m is banked at a 19.0^\circ angle. What is the maximum speed with which a 1900 kg rubber-tired car can take this curve without sliding? (Take the static coefficient of friction of rubber on concrete to be 1.0.) The Attempt at a...

A concrete highway curve of radius 80.0 m is banked at a 19.0^\circ angle. What is the maximum speed with which a 1900 kg rubber-tired car can take this curve without sliding? (Take the static coefficient of friction of rubber on concrete to be 1.0.) I used the equation v = sq rt...

Hi I am working on a project and have been slightly side tracked. I want to examine a graph which has a turning point when y=0 (like y=x^2) however it most be insoluble analytically (i.e. a quintic or above). Can someone give me an example of one or tell me a method to generate one. I...

great video on how turning a sphere inside out http://video.google.com/videoplay?docid=-6626464599825291409 enjoy!

Homework Statement A stiff uniform wire of mass M_0 and length L_0 is cut, bent, and the parts soldered together so that it forms a circular wheel having four identical spokes coming out from the center. None of the wire is wasted, and you can neglect the mass of the solder.

Homework Statement The turning points of a classical harmonic oscillator occur when the potential energy is equal to the total energy, correct? Homework Equations The Attempt at a Solution

Homework Statement I have this function y=e^{-t}sin(2t) Homework Equations \frac{dy}{dt}=e^{-t}(-sin(2t)+2cos(2t)) and I know that we can find from this the turning points. Then we substitute to the second derivative to know if they are positive or negative and thus make them min or max. The...

Homework Statement A supersonic airplane is flying horizontally at a speed of 2840 km/h. What is the centripetal acceleration of the airplane, if it turns from North to East on a circular path with a radius of 86.5 km? How much time does the turn take? How much distance does the airplane...

I think that's what they're called. I was guessing that you just put them in backwards, but I'm betting its more complicated than that?

I am designing a robotic page turner and I am trying to determine the best way for lifting up a page. In my research I ran across an article that discussed using PDMS, the main ingredient in silly putty, as the most optimal material for creating a temporary adhesive bond with paper in order to...

There are 4 or 5 items plugged into the power strip, and it would be more convenient for the people I live with to simply unplug the power strip rather than turn off each electronic item one at a time. So, my question is, will I damage my electronic equipment (including an lcd monitor) if I...

Normally it wouldn't be a big deal for an older person, but it is for me as I'm only 23. My hair is brown with sometimes blond sprouts here and there. But lately when I took a good look in the mirror I see a light grayish shade creeping over my hair. Normally I wouldn't worry, but I have to...

I read this interesting article in the economist this week, regarding American Democracy and Monarchies. In the light of the Queen (of GB) Visiting the USA, it does seem to be highlight a rather ironic fact that: George Bush 89-93 Bill Clinton 93-03 George w Bush 01--09 Hilary Clinton?? 09--...

Imagine that we have a motor running at some power. Now, the spindle of this motor is connected to the axis of a generator, so the rotation of the motor spindle will rotate the axis of the generator. In an ideal situation (no friction, back emf, etc. and using similar number of turns of a coil...

When you were little you were always told not to "play" with light, by turning it on and off. This was because the light bulb would "blow up" faster.. But is this true? I have learned that the tungsten filament in a light bulb wears up because of the heat that makes the tungsten "vaporize"...

Homework Statement Discuss how a person's body is affected when lifting both light and heavy objects. Homework Equations No equations provided. The Attempt at a Solution The body's centre of gravity will be shifting at every moment. (I have a really poor grasp and understanding of...

Homework Statement This is a question about turning effect on a current-carrying coil lying between the poles of a magnet. Please refer to the following link: http://img11.picsplace.to/img.php?file=img10/22/N1_000.gif On the textbook, it is stated the turning effect on the coil can be...

This promises to be a tough final round for this contest. Please vote for the picture that best represents our theme this week, which is all about leaves! 1. Janus http://home.earthlink.net/~parvey/sitebuildercontent/sitebuilderpictures/fall.jpg 2. Moonbear...

This is the 2nd group for this contest. Please vote for the picture that best reflects our theme, which is on leaf/leaves. 1. FredGarvin http://img294.imageshack.us/img294/9505/veriagatedacerdh9.jpg 2. alex caps http://bikeflat.com/albums/album07/DSC_1446.sized.jpg 3. turbo-1...

This will be another difficult round of voting. You have one vote for each group. Please vote for the picture that best reflect out theme this week, which is on leaf/leaves. 1. SpaceTiger http://www.astroskwurl.net/leaves_pf.jpg 2. Janus...

Turning Over A New Leaf This week's theme is all about leaves, the biological kind. Your picture must have, as its central subject, a leaf, or leaves. This must be a real leaf, not fake, or picture/painting of a leaf. [SIZE="4"]Contest Rules: 1. Any digital photo or digitally-scanned...

1. How can turning moments be applied in everyday life? It may be advantageous to give worked examples in each case. 2. Can I use wheels & wrenches as examples? Can you please give me more examples? 3. I really don't know what examples I could work from the wheels and wrenches.

How can I find the turning points for the one dimensional Morse potential V(x) = D(e^{-2ax}-2e^{-ax}) ??

Can anyone give me ideas/hints on how I should go about this?

I am not sure where to start for this problem: A concrete highway curve of 80m is banked at a 16degree angle. What is the max speed with which a 1600kg rubber-tired car can take this curve without sliding? I know the static coefficient of friction of rubber on concrete is 1. I know that...

When we take the turn in a car at a high speed, the turning radius is pretty big. Similarly, at supersonic speeds, the turning radius of aircrafts would be huge. Could anyone tell me the turning radius of aircrafts as such speeds and the minimum turning radius of any aircraft...

Hello, I need to build a toy car, that will perform the following task: Go in a staight line for 5 meters, then follow a semi-circunference (or just turn 180 degrees, but not a about-turn) and go back another 5meters, the turning is around a cone: _____________________________________ --->...

I think I know why I often have to turn two full 360 degree turns over the course of the half hour to one hour before I fall asleep. (I'm one of those furnaces who never has a problem staying warm - climbing under freezing sheets even in the deep winter, is only a problem for about 30...

I'm trying to create a model for a car turning to make a differential (I need forces aplied on the wheel, and all other things) but I don't have enough knowledge of dynamics to do that. Does someone know a book(s), papers or sites with good explanation about that?

WHAT to do!? I'm turning 16 on sat and I don't know what to do at my party.:cry: It's just going to be a party with mostly shy, nerdy people. I want to watch a movie, but that's about it. Any ideas?

What temperature does stone have to reach for it to turn into refractive glass?

Is it true that Newton proved that it is possible to turn a ball inside out without dissecting it using calculus.

Hello all, I have been looking up the golden ratio and found most of what I needed on mathworld. The site states that \phi \ = \ \frac{1}{2}(1+\sqrt{5}). I can see how (despite the fact that I don't understand how the ratio: \phi \ = \ \frac{AC}{BC} \ = \ \frac{AB}{AC} is formed but...

I had never heard of this condition before until I saw it on television today: it is a rare condition where the skin turns grey due to the ingestion of colloidal silver. Silver-protein complexes are deposited in the skin, which causes the skin to permanently to discolor :bugeye: colloidal...

The Theory of Relativity proposes equivalence between mass and energy. Well... since they are "equal", when mass disturbes the spacetime which causes a forcefield that we call gravity, energy should have the same effect on spacetime. Putting a huge amount of mass in a very little place in space...

Suppose the light bulb in Figure 22.4b is a 60.0-W bulb with a resistance of 240 W. The magnetic field has a magnitude of 0.40 T, and the length of the rod is 0.60 m. The only resistance in the circuit is that due to the bulb. Minimally, how long would the rails on which the moving rod slides...

I need some help, I am a relative noob at physics. I need this to get credit on test corrections to boost my test grade. Here's the problem, A 1300 kg car goes around a turn with radius 50 m, at a speed of 75 km/h. The coefficient of static friction is .45, (a) what is the minimum angle of...

is it possible to make matter into energy and turn it back?

I want to take a look at the history of philosophy. I would say it's a look at the history of "philosophy of mind", but it covers more than that. I want to look at the points throughout history where a shift was made, to the using of terms and concepts that had never been used before. I want...

A car is turing round a bend of radius 100m and banking angle 15 degrees. If the coefficient of static friction between the tyres and the road is 0.1, determine the range of speeds within which the car can turn safely round the bend. Here is what I have done: R sin \theta + f >=...

In Richard Feynman's book QED, when writing about multiplying arrows of photons (on page 61 if you have the book handy)he shrinks and turns them at specific numbers, and though I understand why and how it's effective, I don't understand how he determined to shrink and turn the arrows by those...

hi I found this forum on the net... . figured Id give it a try. I'm a musician/audio guy working on a quirky project. my goal is to turn normal objects into speakers by painting them with some magnetic paint I found at my local art store. The other end of this, however, requires that I...