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

Investigating how height affects time taken for a falling object to reach ground level.

Extracts from this document...

Introduction

Physics Coursework 2003:

Investigating How Height Affects Time Taken for A Falling Object to Reach Ground Level.

Introduction:        In this investigation, how height will affect the time taken for a steel ball bearing to reach the ground will be investigated.

It is was Isaac Newton that first discovered gravity and wrote laws defining it. His Second Law of Motion states that the Resultant Force on an object (F) is equal to the Mass of the body (m) times its acceleration (a), or image01.png.

The weight (W) of a body is the force of gravity acting on it, which gives it acceleration (g) if it is falling freely close to the earth’s surface. If the body was to have a mass (m) Newton’s 2nd Law of Motion could calculate its weight. Given that image02.png and image12.png Newton’s Law becomes image18.png.

In April of 2003, in a method similar to that, which will be conducted in this investigation, the acceleration of gravity was concluded to be 9.81image21.png.

Using the knowledge mentioned above, several equation of motion have been created.

...read more.

Middle

0.082

0.3

0.247

0.061

0.2

0.202

0.041

0.1

0.143

0.020

0.0

0.000

0.000

This is what the expected graph of Height vs. time should look like:

image00.png

        Height (m)

                                Time (secs)

The following page shows what the expected graph for Height vs. time2 should look like. It is a straight line passing through the origin, thus proving the prediction image17.png.

The expected gradient, m, should be equal to ½ g, or, 4.905ms-2. It is actually 4.926ms-2, which is only 0.021 ms-2 out or 0.428%. This is probably due to the rounding of decimal places when drawing the graph and human error in plotting the points (i.e. not exactly accurate to 3 decimal places.)


Apparatus & Diagram:

Safety: As there is a very minimal risk in this investigation, no safety measures need to be taken.

It is planned to drop the ball from a height of 1m and decrease in intervals of 0.1m. At each height 5 readings will be recorded and then the mean result will be calculated. This makes the results more reliable (and better for use in calculation like working out g or the mass of the steel ball.)

The Results will be recorded in a table like this:

Height (cm)

Time taken for ball to reach ground (seconds)

Mean Result

Mean Result2

1st

2nd

3rd

4th

5th

100

90

80

70

60

50

40

30

20

10

00

...read more.

Conclusion

image20.png.

Note: The factor that affected the acceleration was g, (which, on earth, is image22.png) is the mass of the planet, for Earth this is constant.

The results of the investigation are consistent with the prediction. The relationship of image17.png was proved in the similarity of the graphs on page 4 & 8, they had almost the exact same gradient, only 0.072ms-2 in difference (or 1.462%) it was also very similar to the mathematical prediction of the gradient (½g) again only 0.051 ms-2 out.

Evaluation:In this investigation, all results are held to be very reliable. When the data was being collected, sophisticated technology was used which measured time accurately and reliably to the nearest thousandth of a second. All recorded results were in very close proximity of each other, so that 0.006seconds was the maximum difference observed.

There were no anomalies observed. All points on the graph on page 8 are not only close to the line of best fit, they are actually on it.

The results in this investigation are believed to be very reliable; as a result no changes need to be made to the procedure.

Physics Coursework October 2003                Andrew Lavery S2F

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Mechanics & Radioactivity 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 AS and A Level Mechanics & Radioactivity essays

  1. Free essay

    The acceleration of a ball down various inclines

    3 star(s)

    4 4� -Result 5 4� -Result 6 4� -Result 7 4� -Result 8 4� -Result 9 4� -Result 10 8.4 9.1 8.9 9.2 8.6 8.3 8.5 8.3 8.2 8.5 34.5 33.9 32.4 33.5 33.7 35.8 34.2 33.2 32.9 33.8 76.5 77.4 77.1 78.2 76.5 77.6 77.7 77.1 77.2 76.4 136.9

  2. Peer reviewed

    Sir Isaac Newton.

    3 star(s)

    Earth's axis, and motion of the Moon as perturbed by the gravity of the Sun. This work made Newton an international leader in scientific research. The Continental scientists certainly did not accept the idea of action at a distance and continued to believe in Descartes' vortex theory where forces work through contact.

  1. Peer reviewed

    Catapult Investigation

    3 star(s)

    However; 6.25cm is approximately double 3.1cm. This is because if you double the distance the elastic band is pulled back which we have then the work done or distance fires quadruples. The following formula takes place: 2F + 2D = 4W F = Force put on the band D =

  2. Objectives: To determine the center of gravity of a body of irregular shapes

    and then the bob is not under SHM. The equations used all cannot be applicable in the calculation process. If we still use wrong data in the calculation, incorrect gravitation acceleration will be obtained. Results & Calculations The values of period and the gravitation acceleration in the experiment can be

  1. Helicopter Investigation

    5 = 1.84 Number of paperclips = 1 Timings 1.61 + 1.73 + 1.71 + 1.65 + 1.61 = 8.31 Average 8.31 / 5 = 1.66 Number of paperclips = 2 Timings 1.54 + 1.63 + 1.52 + 1.50 + 1.52 = 7.71 Average 7.71 / 5 = 1.54 Number

  2. The aim of this experiment is to prove that a falling body has a ...

    This will be measured by hand with a ruler which has again a 1% error as it is measured to the nearest millimeter. ?FPRIVATE "TYPE=PICT;ALT=Measurement of results" The mass will not affect the results but the same amount shall still be used in order to prove beyond a doubt that gravity is constant.

  1. OCR B Advancing Physics Physics Practical Investigation Coursework Investigating Simple Harmonic Oscillations

    Damped Oscillations The above experiment was repeated with a constant volume of water in the plastic cylinder, covering the mass, acting as a damping force. As above, both the maximum amplitude and resonant frequency were recorded in three trials and the average calculated, removing any anomalous results.

  2. Science Coursework - Investigating How Mass Influences Distance Travelled When Firing A Margarine Tub.

    a2= 10/5 a2= 2 This proves that acceleration is inversely proportional to mass. Now I will also prove that the acceleration is directly proportional to the external force exerted. I'll change the external force exerted to 20 N, keeping the mass constant.

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