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

Gravity and the Simple Pendulum.

Extracts from this document...

Introduction

Gravity and the Simple Pendulum Hypothesis: Since the period depends only on the length and on gravity, it is possible by measuring the period and the length of the pendulum to calculate 'g' (g is acceleration due to gravity). The length of the string needs to be measured very accurately to the centre of gravity of the mass to get the accurate value of 'g'. Method: Equipment used: String (7m) Mass (2x50g) Clamp Retort Stand Stop Watch Measuring Tape Protractor 1) The pendulum was hung from the top floor of the school down to the ground floor a few centimeters off the ground. 2) The length of the string was measured with the measuring tape. 3) We displaced the pendulum 5� from its equilibrium position. 4) The pendulum was given a push. 5) The stopwatch was started. 6) ...read more.

Middle

Controlled Variables: Uncontrolled Variables: Mass, length of string, Wind and stairwell. and the displacement. Results: Determining the Acceleration of Gravity Trial # String Length (m) Period (T) sec (10 back-and-forth swings) Experimental Value for 'g' (m/sec�) Accepted Value for 'g' (m/sec�) %Error 1 7 53.34 9.71 9.81 1 2 7 53.28 9.73 9.81 1 3 7 53.21 9.76 9.81 1 Average 7 53.28 9.73 9.81 1 As you can in the results table I included a category for percentage error. I included this category in my results' table so that I could find out how correct our value for 'g' is. Our value of 'g' was 1% incorrect. Discussion: In order to find an accurate value of 'g' we needed to change the equation T=2??l/g to g=4?�*l/T� then we substituted the length (m) ...read more.

Conclusion

Conclusion: Our results prove that our value of 'g' is 1% incorrect, this is quite accurate. Although during the experiment I think we did not measure the length of the pendulum correctly because we did not measure from the pivot point to the center of gravity. We also did not record the period properly because we recorded the period knowing that the pendulum kept hitting the stairwell, when the pendulum hit the stairwell it delayed the period. These two variables probably led us to the incorrect value of 'g'. As an improvement for next time we do this experiment we could measure the length of the pendulum by measuring from the pivot point to the centre of gravity. We could also make the length of the pendulum shorter so that we don't have as much trouble measuring the pendulum and try to do the experiment somewhere where the pendulum won't hit something. ...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. Marked by a teacher

    The Simple Pendulum Experiment

    4 star(s)

    A (s) A-2R (s) T (s) 30 62.2 61.8 2.06 31 62.2 61.8 2.06 32 62.2 61.8 2.06 33 62.2 61.8 2.06 34 62.2 61.8 2.06 35 59.8 59.4 1.98 36 59.8 59.4 1.98 37 62.2 61.8 2.06 Length = 1 metre L = Length of Pendulum's swing A = Time for

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

    This statistical uncertainty can be reduced by making many individual (i.e. independent) measurements and averaging; the systematic uncertainty then decreases with the square root of the number of measurements: making 10 measurements will reduce the statistical uncertainty by a factor of about ?(10)

  1. Investigating the period of a simple pendulum and measuring acceleration due to gravity.

    * If the apparatus are placed to close to the edge of the table then there is a high chance of it falling off the table and onto somebody legs'. This could hurt that individuals leg and so as not to cause any physical harm the clamp should be placed away from the edge of the table.

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

    (Roger Muncaster). I found that measuring the amplitude of displacement accurately was not practical and it was very easy for human error to occur when measuring. I timed how long it took for a simple pendulum of 0.800m in length to complete 30 oscillations when displaced from 5� and then

  1. Experiment to Find Accleration due to Gravity.

    and m = mass (in kg) Normal Force, Fnorm The normal force is the support force exerted upon an object which is in contact with another stable object. For example, if a book is resting upon a surface, then the surface is exerting an upward force upon the book in order to support the weight of the book.

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

    m.s-2 0.54 1.08 1.62 2.16 2.70 3.24 RESULTS Changing the Mass of the Ball Mass of the Ball (g) 6.06 7.30 8.63 28.07 Acceleration (m.s.-2) (Reading 1) 0.50 0.53 0.56 0.54 Acceleration (m.s. -2) (Reading 2) 0.52 0.52 0.55 0.53 Acceleration (m.s.

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

    Dependant Variable: The dependant variable is the time it takes 10 periods to occur. PREDICTIONS & THEIR EXPLANATION: EXPERIMENT No. 1- VARYING THE LENGTH: 1- As the length of the string increases, the period increases. 2- Their will be a proportional relationship between length of string & the period squared.

  2. Determining Gravity with a Pendulum

    Sticky tape the marker holder 1.5m high, while making sure that the magnetic texture holder is immovable and secured. 1. Using the measuring tape; measure out 90cm on the 2m string then using the scissors cut the string, while making sure that the string is cut above 90cm as some measurements are required for the purpose of tying.

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