Question

body b1 collides with body b2 of same mass but at rest what is the result?

Answer 1

IF IT IS HEADON ELASTIC COLLISION,

B1 COMES TO REST,B2 MOVES WITH VELOCITY OF B1 BEFORE COLLISION

IF IT IS INELASTIC COLLISION, THE BODIES STICK TOGETHER, PERMANENTLY DEFORMS,MOVES WITH SAME VELOCITY

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Answer 2

THIS IS ASSOCIATED WITH CONSERVATION OF MOMENTUM.

P= M V 
MASS OF B1 = MASS OF B2 

AS B2 IS AT REST IT WILL FORTUNATELY MOVE STOPPING OR SLOWING DOWN B1.

I HOPE THIS WILL HELP YOU.