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# G Summer As3

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To determine acceleration of free fall using ticker timer

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### G Summer As3

1. 1. All About Physics Determining g with a Ticker Timer Summer Shi AS 3 Suzhou A Level Centre
2. 2. How to find g? <ul><li>Free fall motion: </li></ul>There you go!
3. 3. What do we need? <ul><li>Ticker timer & paper </li></ul><ul><li>Holder/stand </li></ul><ul><li>Flask holder </li></ul><ul><li>Paper clips </li></ul><ul><li>Weight </li></ul><ul><li>M easuring tape </li></ul>
4. 4. Putting them together…… Holder Ticker Timer Paper Clip Paper Flask Holder Paper Clip Weight
5. 5. Follow these steps……(1/6) <ul><li>Put the equipment on a desk with a height </li></ul><ul><li>A desk or any relatively tall horizontal platform is required as the weight has to travel quite a distance in order to have a rather accurate result of g. </li></ul>
6. 6. Follow these steps……(2/6) <ul><li>2. Drop the weight </li></ul><ul><li>Turn on the ticker timer as you drop the weight. The two actions are preferred to be done simultaneously in order to avoid errors and difficulties in calculation. </li></ul>
7. 7. Follow these steps……(3/6) <ul><li>3. Stop the ticker timer </li></ul><ul><li>Stop the ticker timer when the weight hits the ground. Take the strand of paper out and measure the distance between every 2 dots next to each other. Calculate the velocities by using the formula v = s/t. </li></ul>
8. 8. Follow these steps……(4/6) <ul><li>4. Drawing a v - t graph </li></ul><ul><li>Plot a velocity – time graph. Calculate the gradient of the graph as the value of the gradient will be the value of g. </li></ul>
9. 9. Follow these steps……(5/6) <ul><li>5. Repeat the experiment </li></ul><ul><li>Repeat the steps 1 – 4 with different weights. You might get several different results for g. </li></ul>
10. 10. Follow these steps……(6/6) <ul><li>6. Calculate </li></ul><ul><li>Calculate the average of g. This will be the final result. </li></ul>
11. 11. Reliability? High
12. 12. Source of errors <ul><li>Air resistance </li></ul><ul><li>Measuring mistakes </li></ul><ul><li>Calculation mistakes </li></ul>
13. 13. Bibliography <ul><li>Google (pictures) </li></ul><ul><li>www.physicsforums.com </li></ul><ul><li>www.practicalphysics.org </li></ul>
14. 14. The end