momentum

[stupidkid]

sooorry,people if i am dumb, but i aint gettin it, will someone please help me

2 identical buggies each of mass move one after the other without friction with same velocity . A man of mass rides the rear buggy . At a certain moment the man jumps into the front buggy with a velocity relative to his buggy. As a result of this process rear buggy stops .If the sum of kinetic energies of man and front buggy just after collison , differs from that just before collison by ,calculate values of and
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[Jameson]

I think you are missing a lot of words. Every numerical piece of data is left out. Also, you should show some work. Otherwise, most people won't provide any help.

Jameson