1213+Pendulum

The Class of 2016 examined the behavior of pendulums.

Students have been asked to examine the effect of a variable on the period of a pendulum. In the tables below, the students have recorded the results from three trials. A description of the pendulum is also provided.

Sample Table The pendulum was a small car on the end of a 5 m chain hanging off a bridge. The variable that changed was the number of people in the car. The measurement was the time for 5 periods.
 * # of people in the car || Trial 1 (s) || Trial 2 (s) || Trial 3 (s) ||
 * 1 || 55 || 57 || 60 ||
 * 2 || 60 || 58 || 62 ||
 * 3 || 62 || 63 || 59 ||

Next groups should add a divider and a table.

Sam & Shannon 5 Swung
 * Type of bob (mass) || Trial 1(s) || Trial 2(s) || Trial 3(s) ||
 * 1. 1Jiao (New) || 6 || 6 || 7 ||
 * 2. 1Jiao (Old) || 7 || 7 || 7 ||
 * 3. 5Jiao || 6 || 6 || 7 ||

10 Swung 15 Swung Length of our rope was 40 cm, swung 5,10,15 time, our variable was the types of coins used as the pendulum bob, so we tested the mass of the bob.
 * Type of bob (mass) || Trial 1(s) || Trial 2(s) || Trial 3(s) ||
 * 1. 1Jiao (New) || 18 || 19 || 18 ||
 * 2. 1Jiao (Old) || 18 || 19 || 20 ||
 * 3. 5Jiao || 19 || 20 || 19 ||
 * Type of bob (mass) || Trial 1(s) || Trial 2(s) || Trial 3(s) ||
 * 1. 1Jiao (New) || 13 || 13 || 12 ||
 * 2. 1Jiao (Old) || 13 || 12 || 12 ||
 * 3. 5Jiao || 14 || 13 || 14 ||

//We measured the time it took to pendulums swag 5 times during 1,2,4 and 8 Coins.//
 * Trial/Mass of bob || 1 Coin || 2 Coins || 4 Coins || 8 Coins ||
 * Trial 1 || 08.2(sec) || 09.0(sec) || 10.5(sec) || 11.0(sec) ||
 * Trial 2 || 09.1(sec) || 09.5(sec) || 10.6(sec) || 10.6(sec) ||
 * Trial 3 || 08.6(sec) || 09.3(sec) || 10.2(sec) || 10.8(sec) ||

We concluded that the average time it took to swag one time when we use 1 coin is 1.726 sec We concluded that the average time it took to swag one time when we use 2 coins is 1.852 sec We concluded that the average time it took to swag one time when we use 4 coins is 2.086 sec We concluded that the average time it took to swag one time when we use 8 coins is 2.16 sec

End of Session.


 * 10 Swings ||  ||
 * Number of Coins || Trial 1 (s) ||
 * 1 || 18.3 ||
 * 5 || 18.7 ||
 * 9 || 19.0 ||


 * 5 Swings ||  ||
 * Number of Coins || Trial 1 (s) ||
 * 1 || 9.1 ||
 * 5 || 9.5 ||
 * 9 || 9.7 ||

We used the 1 jiao coins. Our angle of release point was at 90º. The length of the string was 81 cm. Our variable was the amount of coins used as the pendulum bob, so we tested the mass of the bob.
 * Number of Swings || Trial 1 (s) ||
 * 5 || 9.0 ||
 * 10 || 17.9 ||
 * 15 || 26.7 ||

Jun Hao & Ali

Length of string: 89cm Coins used: 1 Jiao coins
 * 1 COIN (s) || 2 COINS (s) || 3 COINS (s) || 6 COINS (s) ||
 * 18.7 || 18.5 || 19.5 || 20.2 ||
 * 18.3 || 18.4 || 19.2 || 20.4 ||
 * 18.2 || 18.9 || 19.2 || 20 ||
 * Avg. = 18.4 || Avg. = 18.6 || Avg. = 19.3 || Avg. = 20.2 ||

Alex and Kimmy (above results based on 10 swings)
 * Trials/Length || 100cm(s) || 50cm(s) || 25cm(s) ||
 * 1 || 18.9 || 13.9 || 9.5 ||
 * 2 || 19.3 || 14.0 || 9.7 ||
 * 3 || 19.3 || 13.8 || 9.7 ||

(above results based on a 25cm string)
 * Trials/Swings || 5(s) || 15(s) ||
 * 1 || 6.9 || 20.2 ||
 * 2 || 6.9 || 19.9 ||
 * 3 || 6.9 || 20.3 ||

-For our experiment, we used the variable of the difference in the pendulum's string. We used the same BOB, which is 1 OLD JIAO. The angle of release is at 90˚.

Elena and Annie

Number of SWINGS: 5 Time Unit: SECONDS
 * Trial # & Length of Rope || 20cm || 30cm || 60cm ||
 * #1 || 3.0sec || 4.6sec || 7.7sec ||
 * #2 || 3.8sec || 4.8sec || 7.6sec ||
 * #3 || 4.0sec || 5.0sec || 7.7sec ||

Number of SWINGS: 10 Time Unit: SECONDS
 * Trial # & Length of Rope || 60cm ||
 * #1 || 14.7sec ||
 * #2 || 14.6sec ||
 * #3 || 14.5sec ||

Number of SWINGS: 15 Time Unit: SECONDS
 * Trial # & Length of Rope || 60cm ||
 * #1 || 21.8sec ||
 * #2 || 21.5sec ||
 * #3 || 21.3sec ||

Our release point for all our trials was at a 90˚ angle. We used the same bob through-out the whole experiment(old jiao). The only variable we changed in this experiment is the length of the rope, this caused our results to have a range from a lowest of 3.0seconds and a highest of 21.3seconds(including 5,10, and 15 swings). Our main focus is on swings of 5 times. We did 10 and 15 times swings out of curiosity and mainly because of Mr.Robinson's curiosity.

spencer sho and tian where we released the 5 game tokens is at a 90 degree angle. Each time we timed for 10 swings.
 * trial number || 130cm || 75cm || 10cm ||
 * 1 || 23.67 || 19.71 || 6.19 ||
 * 2 || 23.59 || 18.93 || 6.17 ||
 * 3 || 23.63 || 18.91 || 6.08 ||