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Choosing the best kinematic equation

Problem

A watermelon is dropped from the top of a 80m tall building. We want to find the velocity of the watermelon after it falls for 1.35s. The watermelon has not yet hit the ground.
Which kinematic formula would be most useful to solve for the target unknown?
Assume the positive direction is upward and air resistance is negligible.
Choose 1 answer:
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