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physics help!!

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A 5.50 104 kg space probe is traveling at a speed of 11000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 4.00 105 N over a distance of 2600 km. What is the final speed of the probe?

  • physics help!! -

    The decrease in momentum, M*(V1 - V2)
    is equal to the retrorocket thrust force times the time.

    Solve for V2.

  • physics help!! -

    it doesn't give me the time...

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