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The following data table gives the position of an object during freefall. The time interval between adjacent points is 1/60 seconds.

Point	Position(cm)
1	70.77
2	68.56
3	66.09
4	63.34
5	60.32
6	57.02
7	53.46
8	49.62
9	45.51
10	41.12

What is the instantaneous velocity of the object when it is at position 3?

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