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

A simple Pendulum.

Extracts from this document...


A simple Pendulum. AIM My aim in this experiment was to see if the length of the string the bob was attached to effected the time taken for one oscillation. RESEARCH What a pendulum is: A pendulum is a body suspended by a fixed point so it can swing back and forth under the influence of gravity. Pendulums are frequently used in clocks because the interval of time for each complete oscillation, called the period, is constant. What effects the time for one period? When the bob is moved from equilibrium either left or right and then is released, it oscillates in a vertical plane in the shape of an arc of a circle. This is then reversed back to its starting position. The weight pulling down on the pendulum bob causes the bob to accelerate towards its normal resting point. This acceleration can be calculated by the formula a = -gA. The angle size can also be linked to the arc length, this is shown in the formula, x = LA. With L being the length of the string. ...read more.


Below are some simple guidelines to ensure that our testing is fair. Procedure/Object Problem Solution Clamp Stand Could rock Place a heavy mass on the base to prevent this. Mass of the bob (see note below) If we use different bobs there mass could be different Make sure we use the same bob Angle Angle could be different Make sure we measure the angle accurately Gravity If we move to another area of the world, the effects of gravity will be slightly different Stay in the same area of the earth as much as possible. Human error Human error between releasing the bob and starting the stopwatch. Make sure the same person does each task every time, use a standard pre-release method, i.e. 3,2,1, go. We should also let the pendulum swing for ten periods and then divide by 10 to reduce the effect of human error. Note: Although during my research I ascertained that the mass of the bob does not effect the period of the pendulum, I should still keep this constant, as I should only have one variable in my experiment. ...read more.


My line of best fit shows that the time taken increases in a linear fashion and does not go through the point of origin. This shows me that the period does increase relative to the length of string, this supports my prediction that because of the length of the arc increasing with the length of the string that the period would increase. EVALUATION I believe that my experiment went reasonably well, the results we collected would seem to be very good and we had no accidents. I also believe that the method we used to obtain these results was an accurate one, but it could have been improved with the use of light gates and a computer because this would have removed the element of human error. I would like to take this investigation further by continuing to increase the lengths of the string until about one-meter. I would also like to try this experiment with different angles to see what effect that has on the results and then compare the results to these ones. The evidence I have here is only just enough to support a firm conclusion, but does show a trend appearing. ?? ?? ?? ?? Kenny Larsen Page 1 01/05/2007 ...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

See related essaysSee related essays

Related GCSE Forces and Motion essays

  1. Peer reviewed

    road accidents

    3 star(s)

    Even the lights are getting better, stronger and easy to manage, automatically directed. Car stability is also getting better due to better suspensions and to electronic systems which alert you when something is wrong. Tires are always involving and there are now tires which do not even have air in

  2. Determining the acceleration due to gravity by using simple pendulum.

    As you can imagine, it is difficult to make measurements with this level of accuracy. It is, however, possible to design an instrument capable of measuring accurate distances and times and computing the absolute gravity down to 1 microgal (0.001 mgals; this is a measurement accuracy of almost 1 part in 1 billion!!).

  1. Period of Oscillation of a Simple Pendulum

    It is rearranged to form L = kt�. This can be rearranged so that 'k' can be worked out by 'dividing length by time squared'. The chart gives this as a constant figure that applies to very length or time. Scatter-graph that shows results of the experiment that investigates length.

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

    The two times were within 2.00 seconds of each other, at 53.25 seconds and 54.66 seconds. Therefore I have decided to keep the amplitude of displacement the same throughout the experiment, but it doesn't have that much effect on the results and so it is not important to ensure that


    resolution 2) sensitivity (1) (Resolution): The ability of a measurement to be consistently reproduced (2) (Sensitivity): the number of significant digits to which a value has been reliably measured. If on several tests the temperature sensor matches the actual temperature while the actual temperature is held constant, then the temperature sensor is precise.

  2. Mechanical Properties of a Meter Rule

    I drew a curved line of best fit for when the force used way 9.8N; this was because of elastic limit which is explained in analysis. There were some irregular results gained from some of my graph, but they were not seriously out of line from the best fit.

  1. Strength of a string practical investigation

    Force (F=ma) Stress (F/A) Strain (E/L) 0.5 0.001 0 0.001 6.67E-04 4.9 1.73E+07 1.03E-03 1 0.002 0.001 0.002 1.67E-03 9.8 3.46E+07 2.56E-03 1.5 0.003 0.002 0.003 2.67E-03 14.7 5.19E+07 4.10E-03 2 BREAK 0.003 BREAK 1.00E-03 19.6 6.93E+07 1.54E-03 2.5 BREAK Table 4 Double strand Extension Load (kg) Test 1 Test 2 Test 3 Average extension (m)

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

    Books- the only resource that was available to elevate one end of the runway to slope the runway was books, so I used different amounts of these to alter the height of elevation and therefore altering the angle of the runways slope.

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