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# Change in Momentum Two System Object

APPH12-HE14XM

Two boxes are sliding toward each other on a friction-less table with initial conditions given in the image. The two boxes collide in an elastic collision.

Which of the following indicates the change in momentum of the system after the collision?

A

$140\text{ kg m/s}$

B

$240\text{ kg m/s}$

C

$340 \text{ kg m/s}$

D

$0\text{ kg m/s}$