Problem a student stands at the edge of a cliff and throws, Ask an Expert

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Problem: A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 15.2 m/s. The cliff is 77.8 m above a flat, horizontal beach.

Part A: How long after being released does the stone strike the beach below the cliff and at impact what is its speed?

Please use great detail in explaining the solution. Thanks.

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