12 m and 16 m :) The answer is simple, I got it wrong on a test and this was the answer .... sorry can someone help us out??
No, this is false.
In principle, every well can run dry, and this includes a well that has reached the water table. If the water is taken from the well faster than it's replenishing itself, the well will run dry- and in this situation, typically people need to look for a new place to have a well.
8 m/s
Explanation:
Using conservation of momentum :-

Where:
m1 = Mass of first vehicle
m2 = Mass of second vehicle
u1 = initial speed of first vehicle
v1 = initial speed of second vehicle
u2 = Final speed of first vehicle
v1 = Final speed of second vehicle
From the received informations:



So

Now divide both sides by m1 :-


Therefore, final answer is 8 m/s