How do pendulums works?
813345
While at a gem and mineral show, My wife walked over to a table that had stands or displays of many different types of pendulums, she held her hand just away from each one as she moved down the line. There wasn't a draft in the arena yet one moved towards her. She felt this pendulum was calling out to her. After buying it and taking it home she sat down and braced her elbow on the table. She held the pendulums chain between her index finger and middle finger. Suspending it over the table.\nFirst she asked "could I have a yes?" the pendulum swung forwards and back. Then my wife asked, "could I have a no?" this time the pendulum swung from side to side. As my wife went through some questions, later we learn the pendulum was a female.\nmumbo jumbo?.. I didn't believe it, until I had seen it myself. The main thing I watched, was if my wife's arm was moving... It didn't.\nThis was our first time using a pendulum. Afterwards we spoke to others who have pendulums themselves. They told us how to clean, and care for them. As a "Rock Hound" I was willing to cut and craft these stones and minerals for my wife's hobby. This was about two years ago. Today we have a vast collection of stones, crystals, gems, and minerals...and yes a few more pendulums.
202904
A regular pendulum moves back and forth while hanging from a point. A torsional pendulum twists clockwise and counterclockwise while hanging from a point. In each case, the heavier the lower end of the pendulum, the longer it will swing or rotate. A torsional pendulum also works better with a rubber or other "live" length of material. Using a rope will not give you much rotation after it unwinds this first time.
284218
No they don't hun! The battery takes the place of having it to be wound up... When you wind it up, its taking the inside, making it able to keep going.. The battery does the same thing. It just has the winder, to set the time.. Thats all. No harm in playing with it though.
909370
Well, the equation for the time period of a pendulum is\n\nT = 2*pi*sqrt(l/g)\n\nWhere pi is the mathematical constant, 'l' is the length of the string, and 'g' is the acceleration of gravity.\n\nSo substitute your values, and you then have the equation\n\n0.80 = 2*pi*sqrt( l  /9.8 )\n\nYou could solve for the length and plug that back into the equation.\n\nT = 2*pi*sqrt( l / (.55*9.8) )\n\nSubstitute the length in for 'l' and solve for T
675679
you'd fall very quickly and then go past the centre towards the surface at the other side.\nThen you'd start to fall back to the centre and go back to the other side.\nThis is basically how a pendulum works.\nBy the way.. there should be free fall at the centre of the earth... I.e. no gravity.
763829
I'm not familiar with that particular book, but the differential equations of simple harmonic motion are interesting.  You can make the system as complex as you like.  I've studied SHM in both maths and physics.  I simulated SH oscillators with operational amplifiers; in other words an analogue computer.  First you simulate a frictionless pendulum, then you introduce friction so the oscillations die away, then you introduce forcing terms of various frequencies to see what happens; like pushing a child on a swing.  If you're really clever, you can introduce hysteresis (delay), and extra degrees of freedom (flexible joints in the pendulum), and vary the Q of the system (how sharply you can tune it to the resonant frequency).  It's about the most open-ended project I ever saw.  I did it in second-year physics.  At its simplest, it's just sixth form maths, but you can turn it into an impossibly complex exercise in chaotic systems if you're clever.
792458
I'm assuming the amplitude is the horizontal distance from vertical.  In that case, the amplitude is the base and the pendulum length is the hypotenuse of a right triangle.  Figure that vertical side, subtract it from the length of the pendulum and that's the vertical distance it falls through.  Energy is the weight multiplied by this distance.
638457
its the rhythm \nin physics it is called Resonance\ncheers
949347
The period of  simple pendulum is\n\nT = 2π√(l / g)      if on such planet g is 1/3 of the Earth then \n\ng = 1/3 (9.81) m/s² = 3.27 m/s²\nl = 1.53 m\nThen\n\nT = 2π√(1.53 / 3.27) = 4.3 s
452393
The link to Howstuffworks has good illustrations for a pendulum clock.  You may be able to improvise the parts for a project if you understand what is involved.  I know, a sundial would be easier.  Good luck.
721327
Let's say the pendulum starts on the left. It passes through the eq. point, then moves to the right, then passes the eq. point again, then back to the left. If it took 1 second to move from the eq. point to the right and back again, then it took a 1/2 second to get there from the left and to swing back to the left. Therefore, the period is 2s.
907030
1. it has two pole, north and south pole\n2. if u hang it up by a rope it will face north-south\n3. it always pull the opposite charged object to it.\n4. when it break, the broken parts get same charge and neglect each other to connect.
1147420
If you consider a pendulum to be a simple machine, and a spring to be a simple machine.  You could create a 'complex' machine by taking two pendulums and attaching a spring in between the pendulums.  The collective behavior of these 3 simple machines is now significantly more complicated than had they not been coupled together.
1099721
Automatic quartz is a collective term describing watch movements that combine a self-winding rotor mechanism used in "automatic" mechanical watches to generate electricity with a piezoelectric quartz crystal as its timing element.\n\nA rotating pendulum inside the case is attached to a relatively large gear which meshes with a very small pinion. As the wearer moves, the pendulum turns and spins the pinion at a very high speed - up to 100,000 rpm. This is coupled to a miniature electrical generator which charges three of four small capacitors. If the watch is left unused the capacitors can store enough charge to power the watch for longer periods, usually at least one month, six months for most models. Charge from the capacitor drives a conventional quartz watch mechanism accurate to 1-2 seconds per week.
870396
Pendulum clock is clock based on a swinging weight. If you change the length of the swinging arm you change the time for each swing.\n\nSince wind resistance starts out as nothing and gets stronger, the slower (final speed) object reaches T.V.  first.\n\nThe problem with 1kg=2.2 pounds is pounds is force and kg is mass. But on the surface of the earth kg=kgf (kilogram force) so you should say 1 kgF=2.2lbs
1049686
He is asking for mechanism....Mechanism is how it works. This is a phase equilibria problem. Please refer to A Level option booklet of phase equilibria.
85181
The real pendulum is not described by sines and cosines, or even damped sines and cosines, but matheiu functions. \n\nLd/dt(dA/dt)+g sin A=0\n\nwhere L is the length of pendulum, A is the angle of displacement, t is time, g is the acceleration of gravity.\n\nFor small A, this is approximated as\n\nLd/dt(dA/dt)+gA=0\n\nHowever, this still does not take a lot of other factors into account, that would produce a loss of energy. The quality factor is only relevant if energy is lost as the pendulum oscillates. (If there is no energy loss, you will have an infinite quality factor, since quality factor is inversely proportional to damping factor, and if there is no damping, then the Q must be infinite). You have to add frictional terms, and then solve or approximate the solution to the equation for small angular displacement, or do a brute force exact solution. \n\nThe second reference describes how to relate the parameters of the solution to your equation to the quality factor. \n\nA simple version would be to solve the equation\n\nLd/dt(dA/dt)+bdA/dt+gA=0\n\nwhere b is some sort of frictional factor, that can contain the effects of energy loss in the string, frictional force in the air, and so on. The references show how to relate this to the quality factor.