A lift performs the first part of its ascent with uniform acceleration $a$ and the remaining with uniform retardation $2a$. If $t$ is the time of ascent, find the depth of the shaft.
A lift performs the first part of its ascent with uniform acceleration $a$ and the remaining with uniform retardation $2a$. If $t$ is the time of ascent, find the depth of the shaft.
- A
$\frac{a t^2}{4}$
- B
$\frac{a t^2}{3}$
- C
$\frac{a t^2}{2}$
- D
$\frac{a t^2}{8}$
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