At the edge of a very high sheer cliff, you throw a rock directly upward with an initial speed of 5.9 m/s. On its way back down,

Question

At the edge of a very high sheer cliff, you throw a rock directly upward with an initial speed of 5.9 m/s. On its way back down, the rock misses the cliff edge, landing on the ground far below. You measure that the rock takes a total of 6.68 seconds from throw to landing. Ignore air resistance. What is the height of the cliff above the ground below, in meters?

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