Two objects having equal masses and velocities collide with each other and come to a rest. In this case, the momentum is conserved.
Momentum of a object is the force of speed of it in motion. Momentum of a moving body is the product of mass times velocity.
When the two objects collides, then the initial collision of the two body is equal to the final collision of two bodies by the law of conservation of momentum.
Thus, two objects having equal masses and velocities collide with each other and come to a rest. In this case, the momentum is conserved.
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