A stone is dropped into water from abridge 44.1 m above the water. Another stone is thrown vertically downward 1 s later. Both strike the water simultaneously. What was the initial speed of the second stone?
A)12.25 m/s
B)14.75 m/s
C)16.23 m/s
D)17.15 m/s

Question

Quizplus · Accepted Answer

The first stone falls 44.1 m in 1 s, so its acceleration is g. The second stone must fall 44.1 m in 0 s, so its initial speed must be sqrt(2*g*44.1) = 12.25 m/s.

A Stone Is Dropped into Water from Abridge 44