ANSWER
Both trucks will move together with speed v = 6.67 m/s
so correct answer will be
The speed of the combined vehicles is less than the initial speed of the truck.
EXPLANATION
As we know that there is no external force on the system of two trucks
So here momentum of the two trucks before collision and after collision will remain same
So here we will have

so here we will have




now we will have


so correct answer will be
The speed of the combined vehicles is less than the initial speed of the truck.
This what i found hope it helps
Answer:
The net torque is 0.4962 N m
Explanation:
please look at the solution in the attached Word file
Answer:
You didnt post a picture im not sure how im going to answer that :/