A body subject only to a resistive force -bv (where b is a positive constant) is released from x=x0 with an initial velocity v0. At what time does it reach a point halfway between x0 and the endpoint?

Answers

2(m/b) ln 2

(b/m) ln 2

(m/b) ln 2

(b/m) ln(1/2)

none of the above