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How does the kinetic energy of the two-block system after the collision compare with its kinetic energy before the collision, and why?

How does the kinetic energy of the two-block system after the collision compare with its kinetic energy before the collision, and why?
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How does the kinetic energy of the two-block system after the collision compare with its kinetic energy before the collision, and why?

User Heslacher
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1 Answer

1 vote
It is less, because the blocks have velocities in opposite directions before the collision, so some of their kinetic energy cancels.
User Mike Tommasi
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