Question

A missile of mass 1.15  10² kg is fired from a plane of mass 5.30  10³ kg initially moving at a speed of 3.10  10² m/s. If the speed of the missile relative to the plane is 1.06  10³ m/s, what is the final velocity of the plane?

Answer 1

Initially (before firing) the plane and the missile both were moving with velocity =

Their total mass was

using conservation of momentum

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