1. The problem statement, all variables and given/known data A bullet of mass = 0.015 kg is shot into a ballistics gel at 1200 m/s. The resistive force acting against the bullet is given by F = k v^2 where k is a constant = 0.08 kg/m. Find the velocity of the mass 0.0006 seconds after being fired into the gel. (250 m/s. ) 2. Relevant equations F = kv^2, Fnet = ma, a = dv/dt 3. The attempt at a solution m(dv/dt) = kv2 mdv = kv^2dt m∫dv/v2 = k∫dt m(-1/v(from v to vo) = kt m(-1/v + 1/vo) = kt (-1/v) + (1/vo) = kt/m (-1/v) = (kt/m) - (1/vo) (1/v) = (1/vo) - (kt/m) v = 1/((1/vo)-(kt/m)) then after plugging in t = .0006 sec m = 0.015kg k = .08kg/m and vo = 1200m/s v(.0006) = -422.535 which is not correct, im guessing i am making an algebraic mistake somewhere, any ideas where i should start?