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Physics

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Two billiard balls with identical masses and sliding in opposite directions have an elastic head-on collision. Before the collision, each ball has a speed of 20 cm/s. Find the speed of each billiard ball immediately after the collision.

  • Physics - ,

    momentum (total of zero) and energy (total of 2*(1/2) m v^2) are conserved. Therefore each rebounds at original speed but opposite direction.

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