7- I need help with this questions with full explanation please. A tourist drops

Question

7- I need help with this questions with full explanation please.

A tourist drops a stone off a cliff and it falls into an ocean. Let s(t) represent the position of the stone (in feet above sea level) t seconds after it was dropped. Explain what the equations s(7) = 0 and s'(7) = - 224 mean in practical terms. Choose the correct answer below. The stone is dropped from the height of 7 feet and its velocity is - 224 ft/s when it hits the ocean. Seven seconds after the stone is dropped, it is 224 feet above the ocean. Seven seconds after the stone is dropped, it hits the ocean and its velocity is -224 ft/s. The stone is dropped from a cliff 224 feet high and its velocity is 7 ft/s.

Explanation / Answer

ans : A

The stone is dropped from the height of 7 feet and its velocity -224 ft/s when it hits the ocean

derivative of displacement function is velocity

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