• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Simple pendulum

Extracts from this document...

Introduction

Introduction A simple pendulium is basically a inextensible length of wire at a fixed point, connected a mass called a bob. A period is a full oscilation, meaning when the bob has covered the distance from the point where it is released (A), to the point (E) the other side of the normal and back. In this experiment we will be investigating how the length affets the period of a pendulum. Aim The aim of this investigation is to see how length affects the period of a pendulum Hypothesis i think that if the length is longer then the time of the period will increase, this is because, if the length of the wire increases then the wire will have to travel longer, because the radius of the circle increases, thus increasing the circumference of the circle, and therefore it would take longer to complete the period,, if compared to a wire with shorter length. Its the same as, if you were to travel around a longer cvircle then it will take you longer, then instead, going around a smaller circe. Apparatus 1. Simple Pendulum x 5 (200cm) 2. Bob 3. Stand 4. Timer Method * I will set up the simple (shorter) ...read more.

Middle

But if you do change these variables then again your results wont be reliable no more. Or you would have to keep these changes constant through out the experiment, from the beginning. Results Conclusion As you can see from the results my hypothesis was right. If the length is greater than the the pendulum takes longer to complete a period. If you look at the 15 cm wire, you can see it takes 0.89 sec' to complete a period. Where the 20 cm wire takes 0.99 sec' and the 35cm wire takes 1.29 seconds. So you can see that the time increases as the length of the wire increases. This is because when the length is longer then the radius of the wire also increases, which makes the circumference of the circle bigger. When you have a bigger circumfernce, the pendulum has to travel longer to complete a period, but still has the same force of Gravity - 9.81 m/s. From the graph you can see that every 5 cm the period increase by a around about rate of 0.12seconds, and T^2 has a increase rate of 0.22 seconds; therefore we can conclude that T is proportional to sqrt (l), or that T^2 is proportional to the length. ...read more.

Conclusion

Next time i could use technology, so that i get the right timings, and the data is much more accurate. Or i could also tape the bob to the rod, and then using the scissor synchronize the stop watch and the releasation of the bob to be accuarte. It would work like this. The bob is taped, so i take a pair of scissors, and then i place the blade so that it can cut the tape and release the bob, while i place the handle of the scissors on the button of the stop watch that activates it. So as the scissors closes it cuts the tape, and comes nearer to the stop watch button. And when the scissor closes, it touches the stop watch button at the same time, as cutting the wire! Another problem that could have affected my results could be wind resistance acting upon the bob - it is insignficant but still . You would therefore have to do it in a wind free environment. One other problem was that, sometimes the bob wouldnt move straight, and wobble. To improve this you can, stretch the wire as furthest you can before you release it, and that should stop the wobbling, or otherwise take a bigger angle of release and again, stretch the wire as furthest you can before releasing it. a ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Forces and Motion section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related GCSE Forces and Motion essays

1. ## length of a simple pendulum affects the time

4 star(s)

The blue pendulum has the most gravitational potential energy at the top of the swing because it is higher. This means the kinetic energy and hence speed through the centre will also be greater than for the red pendulum. From previous experiments I know that for trolleys running freely down

2. ## Factors Influencing Resistance of a Wire

3 star(s)

Now if one electron had to pass through one simple cubic unit cell there would be four atoms to hit and it is possible the electron could hit all four. Now if an atom had to pass through millions of these then there could be many, many collisions.

1. ## Determining the acceleration due to gravity by using simple pendulum.

reads Zero. 4) Test the experiment neglecting the time to check if the mechanism works 5) Choose any length and record the time taken to travel the distance 6) Repeat procedure 5 for different lengths and record a graph to give out averages of the time.

2. ## The determination of the acceleration due to gravity at the surface of the earth, ...

you are moving the pendulum through only one plane. 10. Stand, so that you can see the pendulum swinging from side to side. One oscillation will be taken to be when the bob swings from the left extreme, passes equilibrium to the right extreme and back again to the left extreme.

1. ## In this experiment I aim to find out how the force and mass affect ...

? How many results I will take ? What range of variables I will experiment with Safety With this straightforward experiment there is not much that needs to be taken into consideration. No harmful substances are being used, neither are flames, solvents, atomic-reactors or insurance salesmen so all-in-all a relatively safe experiment.

2. ## Factors affecting the time period of a simple pendelum

Therefore, the mass, amplitude and the acceleration due to gravity have to be constant. Since the amplitude and the mass will be constant, the bob will have to displaced by 5cm for the first test, and then so on accordingly for the other tests: Considering the law of energy that

1. ## Investigating factors which affect the period time of a simple pendulum.

G-clamp so that the clamp stand will not move, affecting the results. - Excessively large swings will be avoided (angle of amplitude will be 45 degrees Results of preliminary investigation: Length of string (cm) Period (secs) 50 2.58 40 2.31 30 2.11 20 1.78 10 1.39 My preliminary investigation was successful.

2. ## In this Coursework, we were given the task of investigating some factors which affect ...

Control variable: In order to maintain a fair test in this experiment, I shall control the following variables: 1- The mass of the suspended object which is 21 grams. 2- The length of the string which will be 20 centimetres.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to
improve your own work