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Problem
Problem
A lift performs the first part of its ascent with uniform acceleration
a
a
a
and the remaining with uniform retardation
2
a
2a
2
a
. If
t
t
t
is the time of ascent, find the depth of the shaft. a.
a
t
2
4
\frac{at^2}{4}
4
a
t
2
b.
a
t
2
3
\frac{at^2}{3}
3
a
t
2
c.
a
t
2
2
\frac{at^2}{2}
2
a
t
2
d.
a
t
2
8
\frac{at^2}{8}
8
a
t
2
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