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Mass of Cart B: 3Kg

Spring potential energy: 24 Joules

Two carts are pushed apart when the spring is released.

Thats all the given and i'm suppose to find the final velocity.

I have no idea how to get started.

For me to use Es=(1/2)K*DeltaX^2, i don't have delta x or spring konstant.

For me to use P=M*V, Mass is not give and i dont know the momentum.

The only other equation i have i think that is related to this topic is the impulse equation. F*deltaT= Impulse