This document provides instructions for using a ticker timer and other equipment to determine the value of g, the acceleration due to gravity, through free fall experiments. It outlines the necessary materials, including a ticker timer, paper, paper clips, weights, and measuring tape. It then lists the six steps of the procedure: 1) setting up the equipment, 2) dropping the weight and starting the timer simultaneously, 3) stopping the timer when the weight hits the ground, 4) plotting a velocity-time graph and calculating its gradient to determine g, 5) repeating with different weights, and 6) calculating the average of all g measurements. Potential sources of error are also noted.

1. All About Physics Determining g with a Ticker Timer Summer Shi AS 3 Suzhou A Level Centre

2. How to find g? Free fall motion: There you go!

3. What do we need? Ticker timer & paper Holder/stand Flask holder Paper clips Weight M easuring tape

4. Putting them together…… Holder Ticker Timer Paper Clip Paper Flask Holder Paper Clip Weight

5. Follow these steps……(1/6) Put the equipment on a desk with a height 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.

6. Follow these steps……(2/6) 2. Drop the weight 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.

7. Follow these steps……(3/6) 3. Stop the ticker timer 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.

8. Follow these steps……(4/6) 4. Drawing a v - t graph Plot a velocity – time graph. Calculate the gradient of the graph as the value of the gradient will be the value of g.

9. Follow these steps……(5/6) 5. Repeat the experiment Repeat the steps 1 – 4 with different weights. You might get several different results for g.

10. Follow these steps……(6/6) 6. Calculate Calculate the average of g. This will be the final result.

11. Reliability? High

12. Source of errors Air resistance Measuring mistakes Calculation mistakes

13. Bibliography Google (pictures) www.physicsforums.com www.practicalphysics.org

14. The end