The boy dropped a stone into the well and heard the sound of a stone hitting after 5 seconds. How deep is the well?
| July 5, 2021 | education
The fall of the stone obeys the law of rectilinear uniformly accelerated motion. The initial velocity of the stone is zero, the acceleration of gravity (g) is 9.8 m / s2. Find the depth of the well:
S = v0 * t + gt ^ 2/2 = 0 * 5 + 9.8 * 5 ^ 2/2 = 122.5 m.
Answer: S = 122.5 m.
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