conservation of momentum applies
you are given both masses.
(1200+2400)4900=1200*5700+2400*V
A two staged rocket moves in space at a constant velocity of 4900m/s. The two stages are then separated by a small explosive charge between them. Immediately after the explosion the velocity of the 1200kg upper stage is 5700m/s in the same direction as before the explosion. What is the velocity (magnitude and direction) of he 2400kg lower stage after the explosion.
1 answer
1 answer