PENDULUM Featuring the PENDULUM Gravity Lab Presentation by David Bang Jessamyn Hung Mandy Lin Jennifer Yoon SWINGING WITH GRAVITY.

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PENDULUM Featuring the PENDULUM Gravity Lab Presentation by David Bang Jessamyn Hung Mandy Lin Jennifer Yoon SWINGING WITH GRAVITY

NEWTON’S LAW OF GRAVITY

Determine the value of gravity (g) as accurately as possible. OBJECTIVE

Why did we choose to use the pendulum? How does the pendulum relate to gravity? PROCEDURE : REASONING

Is it possible to measure gravity using a pendulum? HYPOTHESIS If gravity puts force downwards on the pendulum, we should be able to calculate gravity using the time of one period.

STEP ONE: CREATING MODEL PROCEDURE : TRIAL & ERROR What were the errors for our first trial? How did we improve? Left: Trial 1 Right: Final Trial

PROCEDURE : EXPERIMENT What tools and equipment did we use? Which applications and programs helped our process?

STEP TWO:EXPERIMENT PROCEDURE : EXPERIMENT

STEP TWO:EXPERIMENT RESULTS: RECORDED DATA Did having multiple trials help make more accurate results?

TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 1107.9.79.6241 2108.0.8.64 3108.0.8.64 4107.9.79.6241 TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 156.4.64.4096 256.5.65.4225 356.3.63.3969 456.3.63.3969

TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 13011.51.151.3225 23011.21.121.2544 33011.41.141.2996 43011.01.101.21 TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 1209.7.97.9409 2209.6.96.9216 3209.8.98.9604 4209.8.98.9604

TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 15015.71.572.4649 25015.11.512.2801 35015.31.532.3409 45015.91.592.5281 TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 14013.31.331.7689 24013.51.351.8225 34013.11.311.7161 44013.51.351.8225

TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 17017.81.783.1684 27017.71.773.1329 37017.51.753.0625 47017.71.773.1329 TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 16016.21.622.6244 26016.11.612.5921 36016.31.632.6569 46016.51.652.7225

TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 19019.71.973.8809 29019.31.933.7249 39019.21.923.6864 49019.31.933.7249 TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 18018.71.873.4969 28018.41.843.3856 38018.31.833.3489 48018.21.823.3124

TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 111021.52.154.6225 211021.52.154.6225 311021.82.184.7524 411021.92.194.7961 TrialLength (cm)Time (sec) for 10 swings Period (T)T2T2 110020.42.044.161 210020.22.024.080 310020.32.034.1209 410020.42.044.161

STEP TWO:EXPERIMENT RESULTS: RECORDED DATA Finding out the value of “g”: Formula: = Where did the formula come from?

What were the factors that affected the accuracy of our experiment? ASSUMPTION & LIMITATIONS What were our thoughts throughout the process?

Our hypothesis was correct! Using the time of one period, we were able to calculate a measurement of gravity. Our final result for gravity was CONCLUSION 9.77  /  2

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