physics momentum question lock together?

jenny s

New member
A 4.0 kg cart is moving to the right at 3m/s and a 6.0 kg cart is moving to the left at 3m/s on a horizonal frictionless surace.
When the two carts collide they lock together. What is the magnitude of the total momentum of the two-cart system after the collision
how do you find show steps and explain each step

do you first find the final speeds of both carts, would they be equal since they lock togehter . Also is it true that if two carts lock togheter that their final speeds are equal

show stpe on finidng total momeum
 
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