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# Inquiry: Acceleration of Gravity

## Procedure:

• One meter above the ground we have a glass tube with a spigot valve to regulate how fast we drop the droplets of water.

• You need to adjust the valve until you hear a drop strike the foil at the same instant that you see the next drop from the valve begins to fall.

• When you have exactly set the valve, the time it takes a drop to fall to the foil is equal to the time interval between one drop and the next.

• To most accurately determine the time between drops count the number of drops in 30 sec. This is the frequency. Take the reciprocal and you will have the period.

• Record these in your notebook.

• Since you know that d=½at2 for objects falling from rest. Rewrite this formula for acceleration.

• Calculate gravity and % error.

• Now repeat the experiment with the strobe light.

• Use the strobe light to make the next drop appear to "freeze" just below the burette. This should help you be more accurate.