Two carts (A & B) having spring bumpers ...

Two carts (A & B) having spring bumpers collides as shown in figure. Initially `v_(1) ne 0` & `v_(2) = 0`. When the separation between the carts is minimum.

the cart B is still at rest.

both carts have same momentum

both carts have same KE

The KE of the system is at a minimum.

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