pendulum+investigation

= = The effect of the length of the string and the mass the pendulum holds on the period of the pendulum.
 * MASS || Length of string: |||| Small (11cm) |||| Medium (25 cm) |||| Long (109cm) ||
 * 1 coin || || 0.84 || 0.83 || 1.03 || 1.08 || 2.03 || 2.05 ||
 * 2 coins || - || 0.77 || 0.75 || 1.02 || 1.02 || 2.07 || 2.09 ||
 * 3 coins || -- || 0.81 || 0.79 || 1.06 || 1.06 || 2.82 || 2.87 ||

Therefore, if the mass length of the sting is small, it will have a faster swing than a longer string.

The effect of the starting angle and the length of the string on the period length of a pendulum. By Amelia and Shawn When the starting angle decreases, the time decreases, as well. As the length of the string increases, the period of the pendulum increases.
 * ** starting angle ** |||||| ** 30 cm ** |||||| ** 60 cm ** |||||| ** 90 cm ** ||
 * ** 90° ** || 1:74 || 1:40 || 1:36 || 1:70 || 2:00 || 1:84 || 2:14 || 2:06 || 2:26 ||
 * ** 70° ** || 0:89 || 1:06 || 1:08 || 1:35 || 1:31 || 1:31 || 1:51 || 1:67 || 1:65 ||
 * ** 40° ** || 0:67 || 0:68 || 0:75 || 1:10 || 1:12 || 1:15 || 1:50 || 1:47 || 1:34 ||

The effect of starting angle and mass on the period length of pendulum. By Paddy and Khushbu Conclusions: When the angle increases then the time increases too. When the coins increase the time increases too. The effect of the length of the string and the number of coins on the period of a pendulum By Howard, Hae-Wong, Epic Conclusion: more coins make a period of pendulum a little slower; the numbers are almost similar. Also, longer length of the string makes a period of pendulum much slower.
 * Starting angle || 1 coin ||  ||   || 2 coins ||   ||   || 3 coins ||   ||   ||
 * 15 || 1.10 || 1.04 || 1.08 || 1.17 || 1.08 || 1.18 || 1.13 || 1.21 || 1.11 ||
 * 45 || 1.06 || 1.02 || 1.08 || 1.13 || 1.12 || 1.19 || 1.12 || 1.11 || 1.13 ||
 * 90 || 1.22 || 1.12 || 1.22 || 1.20 || 1.20 || 1.23 || 1.17 || 1.02 || 1.21 ||
 * The length of the string || 2 coins || 4 coins || 6 coins ||
 * 20 cm || 0.808 || 0.828 || 0.860 ||
 * 40 cm || 1.240 || 1.272 || 1.278 ||
 * 65 cm || 1.664 || 1.682 || 1.688 ||

The effect of the length of strings and the number of coins on the period length of pendulum. By Esther, Miyu, and Nanaka
 * **Number of coins** |||||| **10cm** |||||| **20cm** |||||| **30cm** ||
 * **1 coin** || 0.7 || 0.73 || 0.69 || 0.93 || 0.96 || 0.93 || 1.16 || 1.18 || 1.16 ||
 * **2 coins** || 0.73 || 0.76 || 0.72 || 1 || 0.97 || 0.94 || 1.19 || 1.18 || 1.18 ||
 * **3 coins** || 0.74 || 0.75 || 0.76 || 0.99 || 1 || 0.74 || 1.22 || 1.19 || 1.26 ||

The effect of starting angle and mass on the period length of pendulum By Elli, Grace

Conclusion : As the coins increase its amount, the time for one period of pendulum is increasing. As the angle of the startign positions increase, the time for one period of pendulum is increasing.
 * = **Starting - Angle** ||||||= **30**** ° ** ||||||= **45**** ° ** ||||||= **90**** ° ** ||
 * **1 coin** || 0.93 || 0.97 || 1.01 || 1.06 || 1.00 || 1.09 || 1.13 || 1.10 || 1.17 ||
 * **2 coins** || 1.01 || 0.97 || 0.99 || 1.10 || 1.11 || 1.11 || 1.22 || 1.26 || 1.18 ||
 * **3 coins** || 1.10 || 1.10 || 1.13 || 1.17 || 1.13 || 1.16 || 1.46 || 1.49 || 1.44 ||

The effect of starting angle and mass on the period length of pendulum By Brian, Kevin Mass of 1 coin=3.2g
 * **Starting Angle** ||  || **30** ||   ||   || **45** ||   ||   || **90** ||   ||
 * **Period** || **5** || **10** || **20** || **5** || **10** || **20** || **5** || **10** || **20** ||
 * **1 coin** || 6.05 || 11.94 || 23.83 || 6.25 || 12.04 || 24.20 || 6.30 || 12.40 || 24.53 ||
 * **2 coins** || 6.10 || 12.00 || 23.97 || 6.12 || 12.36 || 24.67 || 6.70 || 13.00 || 25.40 ||
 * **3 coins** || 6.14 || 12.34 || 24.56 || 6.37 || 12.62 || 25.33 || 6.84 || 13.34 || 26.28 ||

conclusion ㅡ Roughly, with more mass (# of coins), it takes more time to take a period. Takes more time with bigger starting angles because it takes more time to go back and forth.

The effect of mass and length on the period length of pendulum By Srishti and Vivian Conclusion: As the length gets shorter, the "swing" gets faster; and the amount of coins as the bob had little effect on the speed.
 * **Mass/Length** || **65 cm** || **33 cm** || **15 cm** ||
 * **1 coin** || 1.35 || 1.10 || 0.76 ||
 * **2 coins** || 1.40 || 1.09 || 0.75 ||
 * **3 coins** || 1.43 || 1.05 || 0.73 ||

Different affection on pendulum By Antony and Young-Min
 * Angle/Weight || 99.0g || 33.2g || 4.2g ||
 * 60** ° ** || 12.00s || 11.50s || 12.06s ||
 * 45** ° ** || 11.78s || 11.24s || 11.45s ||
 * 30** ° ** || 11.60s || 11.16s || 10.86s ||
 * 15** ° ** || 11.42s || 11,11s || 10.34s ||