Two meteors of rest-mass 0.1 and 0.2 kg, respectively, collide. If the relative speed before collision is 0.1c and an observer sees them coming with an equal and opposite speed and sees the lighter meteor go off at right angles to the original direction of motion, what will be the deflection of the heavier meteor according to the observer? How will the process appear to an observer comoving with: (I) the heavier meteor; and (ii) the lighter meteor? How will it appear to the centre of mass observer?

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This is urgent? Are you trying to stop a meteor from hitting the world? That's awesome. Thanks for looking out for us!