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SCORPION-xisa [38]
3 years ago
8

Wondering if you have enough rope to rappel to the ground, you drop a rock off the top, and hear the sound of it hitting the bot

tom 4.2 seconds later. Find the height of the cliff ignoring the time that the sound takes to travel back to you from the bottom.
Physics
2 answers:
Lena [83]3 years ago
5 0

Answer:

86.5 m

Explanation:

miskamm [114]3 years ago
4 0

Answer:

86.5 m

Explanation:

s =  ut +  \frac{1}{2} at {}^{2}  \\ s = (0)(4.2) +  \frac{1}{2} (9.81)(4.2) {}^{2} \\ s = 86.5m

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