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Tying to a door knob, hit the door and mess up sequence.
Short string
60 oscillations in 30 seconds.
Tied to ruler and held it
60 oscillations for 58 seconds.

Three different variations, wrapped around hand.  Once oscillations hit 60, measured material it was attached to. Twine was 4 1/2 inches, yarn 3 1/4 inches, fishing line 6 inches.

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Shortened string to make the washer swing faster, the longer the string is the faster the speed decreases, adding additional washer (more weight) increased the speed,

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distance between point A and point B decreased with every oscillation 

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distance between point A and point B decreased with every oscillation 

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-the longer the string, the longer it took to get to one oscillation
-the heavier the weight, the faster the oscillation
-the shorter the string, the faster the oscillation
-the lighter the weight, the slower the oscillation

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created a pendulum that was 12 inches in length and started at a 30 degree angle

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shorter the string, the faster the oscillations 

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shorter the string, the faster the oscillations 

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adding a second washer made the oscillation slower

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adding a second washer made the oscillation slower

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is there a mathematical formula to calculate the oscillation that you want? 

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is there a mathematical formula to calculate the oscillation that you want? 

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decrease the length of the pendulum's string and start at a different angle.

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would different string/material affect the oscillation? 

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would different string/material affect the oscillation? 

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Does it matter how matter how many washers were on the string?

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Does it matter how matter how many washers were on the string?

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Longer string= longer oscillation time

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created a pendulum at 12 inches in length at a 90 degree angle

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If you tie the washer at the half point instead of the end point would it make a difference in the speed? Does height affect the oscillation?

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-the length of the string is critical
-Does the type of string matter?

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How can i keep the distance between point A and point B consistent? 

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How can i keep the distance between point A and point B consistent? 

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It was swinging faster at the beginning.

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It was swinging faster at the beginning.

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Does the type of string depend on how fast or slow it goes?

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Does changing the length of the string or weight of the washers do anything?

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Does it matter the angle in which the pendulum was released?

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Does it matter the angle in which the pendulum was released?

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The speed of the weight decreases overtime

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Does the string we used matter? thick string vs the thin plastic string.

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Does the string we used matter? thick string vs the thin plastic string.

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when it reached between 50-60 swings, the pendulum had slowed down but was still able to complete each oscillation.