block with mass m and a velocity v10 collides with a block M at rest. At some time later after the collision the two masses have velocities v1 and v2. No other information is given about the surface on which the blocks are sliding. Which of the following is true? The system consists of the two blocks. a) the mechanical energy of the system is conserved, but the momentum of the system is not b) the momentum of the system is conserved, but the mechanical energy of the system is not

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