(a) Just for fun, a person jumps from rest from the top of a cliff overlooking a lake. In falling through a distance H, she acquires a certain speed v. Assuming free-fall conditions, how much farther must she fall in order to acquire speed 2v? Express your answer in terms of H.

Answer 1

Four times farther, since the kinetic energy must quadruple.

4 H

Answer 2

Soko

Answer 3

I found its 3H