Hey everyone! I'm a newbie here, how are you all today? Anywho, I was doing my physics homework and I came across this question, and I'm stuck :( Can anyone tell me just how to start it? A shell is shot with an initial velocity of 20 m/s, at an angle of 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically. How far from the gun does the other fragment land, assuming that the terrain is level and that air drag is negligible? Totally stuck! Don't even know where to start :( Thanks for your help!