physics
posted by Sunny .
A cart has a momentum of 10. kilogram meters per second east before a collision and a momentum of 5.0 kilogram meters per second west after the collision. The net charge in momentum of this cart is ?
I am not sure how to solve.

physics 
bobpursley
change momentum=final momentuminitial momentum
= m(VfVi)=5W10E=5W+10W=15kg m/s W
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