Ma poate ajuta va rog cineva cu aceasta fișa

Gotta have a picture ^^

The anser is 800 meters i hope i : ): )

We can not use the law of conservation of energy here. we will use the law of conservation of momenta. we will break into two components, the x component will represent east, and y component will represent north.solving this system will give us the velocity of the third mass.we can plug this backi into the first equation: with this angle we can now calculate the velocity:

Where is "the following" ?