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The hobbit Pippin drops a rock into a well of 7 m. Assuming that the rock fell with a constant acceleration of 9.8 m/s^2, a)

The hobbit Pippin drops a rock into a well of 7 m. Assuming that the rock fell with a constant acceleration of 9.8 m/s^2,

a) what is the final velocity?

b) what is the total time it takes until the rock hits the ground?

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