Physics

A car of mass 600 kg is moving at a speed of 20 m/s.it collides with a stationary car of mass 900 kg.if the first car bounces back at 4 m/s,at what speed does the second car move after the collusion?

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  1. conserve momentum.
    600*20 + 900*0 = 600(-4) + 900v

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  2. Jigjiga

    1995

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  3. v=600*20-600*(-4)/900
    =16

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  4. 50.6

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