physics 1

Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initial velocity of +6700 m/s, while rocket B has an initial velocity of +9700 m/s. After a time t both rockets are again side by side, the displacement of each being zero. The acceleration of rocket A is -12 m/s2. What is the acceleration of rocket B?

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  1. 6700t - 6t^2 = 0
    t = 1116.66

    9700(1116.66) + a/2 (1116.66^2) = 0
    a = -17.37 m/s^2

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