• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11

To find out what changes in period occur if we drop the pendulum from different angles and how Period (time it takes the pendulum to travel from one side to the other and back, 1period = 2 swings) and Angle are related to each other.

Extracts from this document...

Introduction

Philipp C. Protschka        Page  of         30 April 2007

Physics Practical

Pendulum Experiments:

Experiment 1

Changing the Angle

Planning A:

Aim:

To find out what changes in period occur if we drop the pendulum from different angles and how Period (time it takes the pendulum to travel from one side to the other and back, 1period = 2 swings) and Angle are related to each other.

Hypothesis:

As greater the angle is as faster the weight will travel. But not only the speed increases also the distance the pendulum has to travel increases. So there is a direct relationship between speed and distance. The prediction is that the amount of time it takes the pendulum for a period will increase as we increase the angle. This is because the distance the pendulum has to travel increases. Friction and air resistance results in a longer period.

Planning B:

The Equipment needed:
a piece of steel wire at least 1 meter long, stand to attach the pendulum, Boss, Angle measurer, Clamp, a watch that counts seconds, pencil and paper/laptop to record the results, a weight to attach on the string (as heavier as better because air resistance has less effect)

...read more.

Middle

Planning B:

The Equipment needed:

  • a ruler about 150cm
  • stand to attach the ruler
  • Boss, Angle measurer
  • Clamp
  • 2 stop clocks
  • pencil and paper/laptop to record the results,
  • ball bearing

In this Experiment the Controlled variables will be the length of the ruler, the gravity, etc…

The independent variable in the experiment will be the angle of which the pendulum (ruler) drops.

Method:

Change the angle on the pendulum (ruler). Then you'll measure the period, the dependent variable. We will drop it from 18 different angles. From 179.99° , 170°, 160°, 150°, 140°, 130°, 120°, 110°, 100°, 90°,80°; 70°, 60° 50°, 40°, 30°, 10°

Angle 1:

  1. Set up Equipment like this:

image10.png

  1. Pull up the ruler to an angle of 10° (measured from the vertical position of the pendulum at rest)  and allow it to swing for ten full periods (over and back, 20 times).
  2. 2 people time how long it takes to do this.
  3. The two results where recorded and averaged.
  4. Step 2-3 where repeated 2 more times in order to give more accurate results. The results from the 1-3 trial where averaged and recorded in a data-collection table
...read more.

Conclusion

Overall Conclusion:

When you change the angle of the pendulum, the period of the pendulum does change. As Bigger the angle as more time it takes the pendulum to travel from one end to another. This is due to more friction and more air resistance as we increase the angle.

Evaluation:

To get better results the following things should be done:

  • Ruler should be made out of steel
  • Ruler should be longer
  • Instead of taking the time with eyes and hand the time should be taken by a light gate.
  • Experiment should be done more often to improve results.
  • Experiment should be done in a Vacuum to cancel out air resistance. (If not possible increase density of pendulum/ruler.)
  • Ball bearing should be top quality steel to reduce friction
  • Ruler should be attached to ball bearing as tight and close as possible to reduce friction.

Last printed 4/30/2007 8:34 PM

...read more.

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

See related essaysSee related essays

Related GCSE Forces and Motion essays

  1. Marked by a teacher

    Additional Science - What affects the period of a pendulum?

    3 star(s)

    3- Using the elastic band, attach the ruler to the retort. 4- Get a protractor and see if the angle is 180� (straight line). 5- Get a partner to assist with dropping the ball bearing at the set height. 6- Make sure your partner drops the ball bearing at the same time when you start the stopwatch.

  2. Peer reviewed

    Factors Influencing Resistance of a Wire

    3 star(s)

    I have a rough graphs to represent this below. The above graph shows that as the length of wire increases, so will the number of atoms/collisions; and if the number of collisions increases so will the resistance. The diagram above shows that the longer the wire, the longer, and more

  1. To investigate the time taken for the pendulum to oscillate for a time period.

    This means that there can be no or minimal change in gravitational acceleration, degree of displacement, mass air resistance and tensile force. The tests should be conducted as accurately as possible. In order to make sure the reaction times for the stopwatch have a minimal effect the period for10 oscillations should be measured.

  2. Motion of an object as it slides down a slope at different angles to ...

    of measuring the horizontal distance where the bottom hits the floor to the edge the table. By measuring in this way I am being consistent. There will be a slight systematic error, since the angle which the cylinder makes with the horizontal when it is lying on the gutter will

  1. Investigating the amazingness of theBouncing Ball!

    To make squash balls, this raw rubber undergoes a process called vulcanisation. This is when the rubber is heated together with sulphur; the sulphur atoms bond covalently with the carbon atoms to form extra cross links between the linear chains, thus producing a more useful material.

  2. See what will happen if I change a variable whilst I swing a pendulum ...

    The factors which I will not control are the effects of gravity on the pendulum and the resistance of the air on the swinging. Factors involved in predicting I will take into account the string length and the weight of the pendulum.

  1. To find out whether changes in weight and the length of a pendulum will ...

    * Put a 200g-weight disc on a weight holder with a 25cm string tied to the hook of the holder and tie the other end to a clamp stand. * Release the pendulums from a horizontal position making sure the stand is stable and then count the time it takes for 10 swings with a stop clock.

  2. The Pendulum

    Next we will completely redo the whole experiment, starting at 5cm up to about 95cm at about 90 degrees. 14) Finally we will find out the averages for each length and record the results on to a graph. How this will be a fair test: Because every time we

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