1. Problem statement. A spring powered dart gun fires darts straight downward towards the earth from the same height each time. First it fired a regular dart, then a dart with twice the mass. Which dart takes the least time to reach the ground after exiting the gun? A) the regular dart B) the weighted dart C) each takes the same time D) there is insufficient information to answer the question. 2. Related equations conservation of energy 3. Attempt at solution Just to make sure I got the correct answer, would both darts take the same time to reach the floor since the energy is conserved and the mass has no effect on the velocities?