A missile of mass 1 kg is moving with speed 10 m/s along the +ve x direction. Its target is a car weighing 100 kg, moving with 1 m/s also in the +ve x direction. The missile hits the target but doesn't burst. Find the combined velocity of car-missile system?
Take missile & car as a system No external force.
= (1 + 100) v (assuming car moves with velocity v after missile hits)
Now ∴ No external force so momentum conserved.
101 v = 110