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

To calculate the acceleration due to gravity by dropping a ball from a certain distance and recording the time

Extracts from this document...


Lab Report 3

Find acceleration due to gravity using ball drop method

Amine Alami IB1-3

Lab Report


To calculate the acceleration due to gravity by dropping a ball from a certain distance and recording the time


it is expected that the gravity should be within the same range for each trial


The independent variable = the distance

The dependent variable = the time

Controlled variables are: - the mass of the steel ball

                                         - the position of the trip plate

                                         -the length of the plumb line


  -  meter stick , half meter stick

  - 1 steel ball

  - Boss and clampimage00.png

  - Electronic Timing Device

  - Release mechanism

  - Plumb bob

   -trip plate


- A steel ball was inserted between the jaws of the release mechanism

...read more.


100 cm



100 cm



100 cm



100 cm



100 cm



100 cm



100 cm



100 cm



100 cm



100 cm



100 cm



100 cm



100 cm



100 cm


Table 2. The time it takes the ball to fall half a meter






...read more.


 = Sum/20

= 9.049/20

0.452 ± 0.006

s = ½ g t^2

1 = ½ g (0.452)^2

1/g = (0.452^2)/2

G= 2/(0.452^2)

G=9.79 ± 0.4

Average Time in Table 2 = Sum/20

= 6.331/20

 0.317 ± 0.006

s = ½ g t^2

½  = ½ g (0.317) ^2

(1/2) / (1/2) = g (0.317)^2

1 = g (0.317)^2

g = 1 / (0.317)^2

G = 9.95 ± 0.4

- Percentage uncertainty of gravity 1 = (0.4/9.79) x 100 = 4.09%

- Percentage uncertainty of gravity 2= (0.4/9.95)x100 = 4.02%


- The results were in the same range

- The firs gravity was very close to the ideal gravity


- The method used was fairly accurate

-but there are many sources of error which may affect the result obtained using it

- Sources of Error:

   - Air resistance is an error, but it has a slight effect

   - The thumbscrew is clicked twice

   - The thumbscrew wasn’t pressed properly

   - The ball might not fall in the centre

   - The clamp may move slightly upwards or downward after every few measurements

- The same person should press the thumbscrew through out all the experiment

- The thumbscrew should be pushed with quickly and firmly

...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)

    and decomposition of white light, calculus, and his Three Laws of Physics, but amid these fine achievements, he was the first to fully explain what gravity is. His inspiration was a falling apple, and he wondered why the apple went towards the ground, and not in any direction.

  2. SHM: determining acceleration due to gravity

    If 10, sin , sin. and this may affect the experimental result. Secondly, there is a air resistance existing on the weight. Some of the restoring force is lost as friction instead of resorting the weight to the extreme position.

  1. Use of technology in a hospital radiology department. The department of imaging is one ...

    [23] 4) If employee did not comply with the quality system of the hospital the first step of disciplinary will receive verbal reprimand from his/ her supervisor to stop the behaviour or improve the performance. Second step is written later to the employee asking the employee to stop the behaviour or improve

  2. Physic lab report - study the simple harmonic motion (SHM) of a simple pendulum ...

    -6.11E-03 2.14E-01 -1.83E+00 <BR />1.10E+01 6.67E-01 1.57E-01 -6.11E-03 1.83E-01 -4.59E-01 <BR />1.20E+01 7.33E-01 1.57E-01 -8.15E-03 0.00E+00 -2.75E+00 <BR />1.30E+01 8.00E-01 1.63E-01 -1.02E-02 9.17E-02 1.38E+00 <BR />1.40E+01 8.67E-01 1.57E-01 -1.02E-02 -9.17E-02 -2.75E+00 <BR />1.50E+01 9.33E-01 1.53E-01 -1.02E-02 -6.11E-02 4.59E-01 <BR />1.60E+01 1.00E+00 1.39E-01 -1.02E-02 -2.14E-01 -2.29E+00 <BR />1.70E+01 1.07E+00 1.22E-01 -8.15E-03

  1. Multi-bladed Pumps. Does the number of propellor blades affect the efficiency of a ...

    The major difficulty with this experiment is the unpredictable nature of the propellers - unlike many other things physics, it is not easy to find a good estimate of what will happen in textbooks or online. One way of ensuring good results is to measure the variables to a reasonable number of significant figures.

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

    The motion of the board disturbs us to mark the intersection points on the edges. As a result, the intercept point of the lines drawn on the paper do not really represents the center of gravity of the irregularly shaped board.

  1. Measuring the acceleration due to gravity in the lab.

    The timing apparatus was too imprecise and the air resistance due to the lack of a vacuum meant that the data was not as exact as was needed. A more suitable set of timing equipment would have been to replace the stop clock with a light-gate and data-logger.

  2. Determination of the acceleration due to gravity (g) by free fall.

    Clamp the Ball Release Mechanism in the vertical position as illustrated in my diagram, at the desired height. 2. Put the Ball Receptor plate on the table, positioning it beneath the Ball Release Mechanism. 3. Make several test drops to insure that the ball will strike the Ball Receptor Plate.

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