Question

A bubble originating at the bottom of a lake rises to the surface within 10.0 seconds with an acceleration of 10.0 meters/second2. What is the depth of the lake?

100 meters

200 meters

300 meters

400 meters

500 meters

Answer 1

s = vi t + 1/2 a t^2
where vi – initial velocity, m/s;
t – time, s;
a – acceleration, m/s^2.

s = 0·10 + 1/2 · 10 · 102 = 500 m