Answer:
velocity= 4.24 m/s
Step-by-step explanation:
From collision, I understood that it means momentum. As confirmed from another site (I already answered this question but a moderator deleted my answer to this question as I gave the link to that website).
Momentum= mass × velocity
Plug in the values:
990 kgm/s= 4200 kg × v
v= 4200/990
velocity= 4.24 m/s