physics - linear momentum with rockets

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A rocket of total mass 3180 kg is traveling in outer space with a velocity of 115 m/s. To alter its course by 35.0 degrees, its rockets can be fired briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of 1750 m/s, how much mass must be expelled.

  • physics - linear momentum with rockets -

    deltamass*velocity gas= 3180*vperp

    So figure the new vperp of the rocket to give a 35degree change with initial velocity 114 (tan35=Vperp/115 ?)
    then figure deltamass

  • physics - linear momentum with rockets -

    This is not correct.

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