Pendulum count:

What was the length of the pendulum you counted, and how many counts did you get in 30 seconds? 

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What therefore is the period of motion of that pendulum?

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How does your result compare with the formula given on the board, T = .2 sqrt(L) where T is period of oscillation in seconds and L the length in centimeters?

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How well did the freely oscillating pendulum synchronize with the bouncing pendulum of the same length?  Which was 'quicker'? 

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Bracket pendulum:

Shim the bracket pendulum until the 'strikes' appear to occur with a constant interval.  Click when you release the bead, then click for alternate 'strikes' of the ball on the bracket pendulum (that is, click on release, on the second 'strike', on the fourth 'strike', etc., until the pendulum stops striking the bracket).   Practice until you think you think your clicks are synchronized with the 'strikes'.  Report the length of the pendulum in the first line, then in the second line report the corresponding time intervals below, separated by commas:

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Using the same length, set the pendulum so it swings freely back and forth.  Click each time the bead passes through the equilibrium position.  Continue until you have recorded 11 'clicks'.  Report the corresponding time intervals below in one line, separated by commas.

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For both sets of trials, how do your results compare with the prediction of the formula T = .2 sqrt(L)?

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