Hi. This was the one extra problem credit problem I couldn't figure out in our momentum unit. (Since its not homework I posted here) In a fireworks display, a 3.0 kg rocket moving at 4 km/h straight up explodes into three equal pieces of of 1.0 kg in mass. Piece A moves straight horizontally at a speed of 4 km/hr. Piece B moves at 37 degrees down from the horizontal and opposite piece A at a speed of 5 km/hr. What is the magnitude and direction of the velocity of piece C? My ideas: Well, since there's conservation of mass we know the velocity. Can someone work this out for me?