Question

You drop a rock down a well that is 11.5 m deep. How long does it take the rock to hit the bottom of the well?

A. 2.8 s
B. 2.3 s
C. 1.5 s
D. 3.1 s

Answer 1

use: x = ut + (1/2) g t ^2

x = 11.5
u = initial velocity = 0

solve for t