Pendulum AP or Bonus Activity

Do the Pendulum Activity found here:

http://www.worsleyschool.net/science/files/pendulum/pendulum1.html

Each student must record their observations and write their conclusions.

Please use lengths of 20cm50cmand 1.0m for the third activity.

Bonus. Use the pendulum equation to determine the gravitational field constant on a planet that produces a period of 1.26s with a 1.0m long string.

Cool Pendulum video

http://sciencedemonstrations.fas.harvard.edu/icb/icb.do?keyword=k16940&pageid=icb.page80863&pageContentId=icb.pagecontent341734&state=maximize&view=view.do&viewParam_name=indepth.html#a_icb_pagecontent341734