A pendulum is something hanging from a fixed point which, when force is applied, swings back, forth, up, and down due to gravity and inertia (Beynon 1). Pendulums can range in shape, size, and weight. An example of a pendulum can range from a swinging chandelier to a washer tied to some string and hung from the ceiling. Galileo was a famous scientist who studied pendulums. He discovered that the period, or time for one full swing, was always the same on a pendulum no matter what the weight on the end is or how wide the swing. He found that the only factor that affected the period was the length of the pendulum (Fleisher 18-20). With this knowledge and some simple equations the acceleration of gravity on Earth can be found. Materials

5 different pendulums with different lengths, stopwatch, meter stick Procedure
Start each pendulum from approximately 10°
Let the pendulum go for 10 full swings
Time dhow long the 10 swings took and divide this time by 10 to get the period Repeat this same procedure 3 times on 5 different pendulums. With proper measurements and times a relative acceleration can be found for the gravity of Earth. Though calculations are difficult to be exact because of the effects of human error and air friction, they are relatively close to the accepted value of 9.8 m/s². The pendulum became a way to not only develop a more sophisticated clock but also as a proof of the rotation of the planet Earth. Works Cited

Beynon, Zinaida. About Foucault Pendulums. 1999. California Academy of Sciences. 21 Nov. 2005 . Fleisher, Paul. Objects in Motion. Minneapolis: Lerner Publications Company, 1987. 18-22.

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Pendulum
From Wikipedia, the free encyclopedia
This article is about pendulums. For other uses, see Pendulum (disambiguation).
"Simple gravity pendulum" model assumes no friction or air resistance. |
An animation of a pendulum showing the velocity and acceleration vectors (v and a). | |
A pendulum is a weight suspended from a pivot so that it can swing freely.[1] When a pendulum is displaced from its restingequilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force combined with the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. A pendulum swings with a specific period which depends (mainly) on its length.
From its discovery around 1602 by Galileo Galilei the regular motion of pendulums was used for timekeeping, and was the world's most accurate timekeeping technology until the 1930s.[2] Pendulums are used to regulate pendulum clocks, and are used in scientific instruments such as accelerometers and seismometers. Historically they were used as gravimeters to measure the acceleration of gravity in geophysical surveys, and...

...the real lab:
* The compound bar pendulum AB is suspended by passing a knife edge through the first hole at the end A. The pendulum is pulled aside through a small angle and released, whereupon it oscillates in a vertical plane with a small amplitude. The time for 10 oscillations is measured. From this the period T of oscillation of the pendulum is determined.
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* In a similar manner, periods of oscillation are determined by suspending the pendulum through the remaining holes on the same side of the centre of mass G of the bar. The bar is then inverted and periods of oscillation are determined by suspending the pendulum through all the holes on the opposite side of G. The distances d of the top edges of different holes from the end A of the bar are measured for each hole.The position of the centre of mass of the bar is found by balancing the bar horizontally on a knife edge. The mass M of the pendulum is determined by weighing the bar with an accurate scale or balance.
* A graph is drawn with the distance d of the various holes from the end A along the X-axis and the period T of the pendulum at these holes along the Y-axis. The graph has two branches, which are symmetrical...

...Report : Experiment One
Title: Determination of the acceleration due to gravity with a simple pendulum
Introduction and Theory: A simple pendulum performs simple harmonic motion, i.e. its periodic motion is defined by an acceleration that is proportional to its displacement and directed towards the centre of motion. It can be shown that the period T of the swinging pendulum is proportional to the square root of the length l of thependulum: T2= (4π2l)/g
with T the period in seconds, l the length in meters and g the gravitational acceleration in m/s2. Our raw
data should give us a square-root relationship between the period and the length. Furthermore, to find an accurate value for ‘g’, we will also graph T2 versus the length of the pendulum. This way, we will be
able to obtain a straight-line graph, with a gradient equal to 4π2g–1.
Procedure: Refer to lab manual.
Measurement / Data:
Length of Pendulum ( l +/- 0.1 cm) | Time for 20 Oscillations (s) | Time for 1 Oscillation (Periodic Time) T (s) | T^2 ( s^2) |
| 1 | 2 | Mean | | |
35 | 24.00 | 23.87 | 23.94 | 1.20 | 1.43 |
45 | 26.50 | 26.75 | 26.63 | 1.33 | 1.77 |
55 | 29.94 | 29.81 | 29.88 | 1.49 | 2.23 |
65 | 32.44 | 32.31 | 32.38 | 1.62 | 2.62 |
75 | 35.06 | 35.00 | 35.03 | 1.75 | 3.07 |
85 | 37.06 | 36.87 | 36.97 | 1.85 | 3.42 |
95 | 39.25 | 39.19 | 39.22 | 1.96 | 3.85 |
Length of...

...This article is about pendulums. For the band, see Pendulum (band). For other uses, see Pendulum (disambiguation).
"Simple gravity pendulum" assumes no air resistance and no friction. |
An animation of a pendulum showing the velocity and acceleration vectors (v and A). | |
A pendulum is a weight suspended from a pivot so that it can swing freely.[1]
When a pendulum is displaced from its resting equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force combined with the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. A pendulum swings with a specific period which depends (mainly) on its length. From its discovery around 1602 by Galileo Galilei the regular motion of pendulums was used for timekeeping, and was the world's most accurate timekeeping technology until the 1930s.[2] Pendulums are used to regulate pendulum clocks, and are used in scientific instruments such as accelerometers and seismometers. Historically they were used as gravimeters to measure the acceleration of gravity in geophysical surveys, and even as a standard of length. The word 'pendulum' is...

...Oscilations
Pendula
A pendulum consists of an arm of low mass with a bob, which has a higher mass, on the end. The top of the arm is pivoted so that the pendulum can swing. A pendulum will continue to swing back and forth indefinately, until it is stopped by air friction and friction within the pivot. When the angle, á, between the stationary line of the pendulum (the line towards which the movement tends) and the line of maximum amplitude of the pendulum is quite small, then the time period of the pendulum can be found according to the following equation:
, where l is the length of the arm of the pendulum (between the pivot and the centre of mass of the bob) and g is the acceleration due to gravity (on earth ñln9.81). For the spring, a similar equation can be derived. For any spring, , where m is the mass of the bob on the spring and k is hookes constant. Hookes constant is the constant of proportionality of force against extension
for any spring, and varies from spring to spring. In formulaic terms. . The unit for thisd quantity is newtons per metre. Substituting the above equation (Hooke's Law) into the equation, , and therefore, . g here is the acceleration due to gravity, as the force on the spring consists of the weight of the bob. On the moon, the time period of the pendulum would change, as l is a constant where as g would...

...She isn’t a very good man! Andy Fickman’s She’s the Man did indeed hit the fan.
In this film review I will be going to talk to you about the relevance of the film to teenagers, the quality of film techniques and the quality of actor performances. I will also be talking about Shakespeare intent for the original play, and how is this achieved in the adaption of "She's the man". The social, moral of ethical message conveyed in the film and its value to teenagers.
Shakespeare's original play had the theme of love, appearance vs reality, madness, dramatic irony, through the portrayal of a female losing her brother and who is trying to make her way in life as a man because she knows that women could not make their way because the society back then was sexist, rude and extremely cruel. Andy Fickman's ‘She's the Man’ had the same relevancy as Shakespeare's play but did not quite reach the standard of Shakespeare's work , it seems like he wanted to get as close to Shakespeare’s original intent but just went in the complete opposite direction. He failed miserably and made a horrible movie.
She's the Man is about Viola Hastings, a girl whose passion is Soccer. She then finds out that the Girl's Soccer Program gets cancelled at her school. She then tries out for the guy's team, but they tell her that girls aren't good enough. So when Viola finds out that her fraternal twin brother, Sebastian is sneaking...

...Pendulums and Gravity
Ashu Mishra
B2 Physics
Pooja, Logan Meyer
Please read #'s 1-8 before you read the bottom section
1.
2.
3.
4.
5.
6.
7.
8.
9. formula for solving the period of a pendulum
10. derivation from #9 to solve for gravity
The gravity is inversely proportional to the period
Number 5 shows that if there is more gravity and everything else is constant then angular acceleration increases which can be assumed to reduce the period therefore gravity is inversely proportional to the period. This is proved by number 9 which is the formula for solving the period of an object in harmonic motion which pendulum motion fits into.
Length is proportional to the period
Number 8 shows that length is inversely proportional to gravity. We have confirmed that gravity is inversely proportional to the period. Just like 2 minus signs equal a plus, two inversely proportional relations equal one proportional relation. Therefore is it evaluated that length is proportional to period.
Measuring the length
Mark a segment of the string with sharpie
Draw a pencil line on the center of gravity
While holding the pendulum hold it at the center of the sharpie mark
Press the center of the sharpie mark at the 2cm mark of the meter stick so the length will not be changed by the tilting of the ruler
Measure from the middle of the sharpie mark to the center of gravity do this while hanging the...

...investigation of the simple pendulum
2.0 Objectives
The purpose of the experiment is to investigate the time taken on the greatest possible precision of period of simple pendulum and the value of g, acceleration due to gravity and two different periods of both big and small simple pendulum’s oscillations.
3.0 Summary of Result
The results of the experiment have proven the acceleration due to gravity and the precision of period of simplependulum. Besides that, the length of the pendulum did influence the period and the period increased linearly with length. The results matched to within 11.00 %. Thus the experiments were all carried out successfully.
4.0 Theory
A simple pendulum consisting of a point mass m, tied to a string, length L. The period of a pendulum is also known as the time taken for the pendulum oscillates one complete cycle. To have a complete cycle, Figure 1 show the motion of pendulum when it is released. The bob will move from A to rest position to B to rest position again and lastly back to point A.
Figure 1
The starting angle, Ө is the maximum amplitude of the oscillations. The amplitude will decreases with time since the energy will losses. For small starting angle, Period of pendulum, T can be calculated by the formula below, with g as the acceleration
“T” becomes precise in the limit of zero...

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