• 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...

Introduction

Lab Report 3

Find acceleration due to gravity using ball drop method

Amine Alami IB1-3

Lab Report

Aim:

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

Hypothesis:

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

Variables:

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

Equipment:

  -  meter stick , half meter stick

  - 1 steel ball

  - Boss and clampimage00.png

  - Electronic Timing Device

  - Release mechanism

  - Plumb bob

   -trip plate

Procedure:

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

...read more.

Middle

100 cm

0.456

8

100 cm

0.456

9

100 cm

0.452

10

100 cm

0.454

11

100 cm

0.452

12

100 cm

0.451

13

100 cm

0.448

14

100 cm

0.452

15

100 cm

0.448

16

100 cm

0.455

17

100 cm

0.448

18

100 cm

0.450

19

100 cm

0.450

20

100 cm

0.457

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

Trial

Displacement(s)

±0.5mm

Time(t)

±0.

...read more.

Conclusion

 = 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%

Conclusion:

- The results were in the same range

- The firs gravity was very close to the ideal gravity

Evaluation:

- 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)

    This experiment only increases my fascination with this type of science. This experiment also improves certain personal skills, such as the ability to collate, analyse, interpret and conclude. This is another reason I chose this experiment. Sir Isaac Newton was renowned for many things, among them his studies of refraction

  2. Experiment to find the acceleration due to gravity using free fall.

    This is due to the fact that acceleration due to gravity is a constant for all objects irrespective of mass where air resistance is negligible. If we wish to find the acceleration due to gravity we only need to know the displacement of the ball and the time taken for it to fall that distance.

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

    Repeat the measurement least three times and record these values. Calculate the average of your measured times. Results: The table below shows the obtained results, with the time period squared. Height / m t1 (s) t2 (s) t3 (s) ta (s)

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

    free fall g using a simple pendulum Experimental Design Apparatus: Name of apparatus Number Remarks Plumb line (with bob) 1 pc >1.5 m Stopwatch 1 pc Has zero error (� 0.1 s) Small wood piece 2 pic Plasticine 1 pc To hold the pin as the reference point G-clamp 1

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

    1.22E-01 -3.67E+00 <BR />8.90E+01 5.87E+00 -1.22E-01 1.63E-02 6.11E-01 7.34E+00 <BR />9.00E+01 5.93E+00 -9.78E-02 1.22E-02 3.67E-01 -3.67E+00 Experimental results in graphical representation: Analysis: (a) Shape of displacement-time, velocity-time and acceleration-time graphs From the experimental results and the graphs plotted above, it appears clearly that the displacement-time, velocity-time are in the form of sine and cosine curves respectively.

  1. Experiment to Find Acceleration due to Gravity

    The friction force opposes the motion of the object. For example, if a book moves across the surface of a desk, then the desk exerts a friction force in the opposite direction of its motion. Friction results from the two surfaces being pressed together closely, causing intermolecular attractive forces between molecules of different surfaces.

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

    Infection control polices is applied ==> The hospital has proper procedure that can minimise infection getting to the worker, visitors and patients. Infection can be control by following correct and safe procedures when dealing with body fluid and body wastes ==> Wearing gloves and plastic apron when dealing with body fluid and body wastes e.g.

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