It takes 6 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?
A) about 60 m
B) about 180 m
C) about 120 m
D) more than 200 m

Question

Quizplus · Accepted Answer

The depth of the shaft can be calculated using the formula for the distance covered under gravity, which is $d = \frac{1}{2}gt^2$, where $g$ is the acceleration due to gravity (approximately $9.8 \, \text{m/s}^2$) and $t$ is the time in seconds. Plugging in the values, we get $d = \frac{1}{2} \times 9.8 \times 6^2 = 176.4 \, \text{m}$, which is about 180 m.

It Takes 6 Seconds for a Stone to Fall to the Bottom