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Measuring the acceleration due to gravity in the lab Aim Our aim was to find the acceleration due to gravity in the laboratory. Method The distance between the ceiling and the floor (h) was measured. A rubber was then dropped from the ceiling and the time taken for it to hit the ground was recorded. Results Attempt Time Taken (sec) 1 0.47 2 0.45 3 0.71 4 0.55 5 0.5 6 0.71 7 0.4 8 0.46 9 0.58 10 0.56 Average Time = Sum of all times Number of Times = (0.47+0.45+0.71+0.55+0.5+0.71+0.4+0.46+0.58+0.56) 10 = 5.85 10 = 0.59 sec (to 2 dp) H = height of the drop T = time taken Acceleration due to gravity = 2H T2 =2(2.59) 0.592 = 5.18 0.3481 = 14.88 m/s2 (to 2 dp) Evaluation The results circled in the table are anomalous. There was a wide range of results, from 0.4 to 0.71. This spread of results indicates that the data may be inaccurate. Although the experiment was repeated nine times, different results were found at nearly every attempt. This could be due to the timing methods used. A stop clock held by...

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