# Momentum: Rocket moves in outer space; final velocity if gas is 25% of initial mass

A rocket moves in outer space with no external forces acting on it. It starts from rest and then continuously exhausts gas at a speed of 6.0 km/s, relative to the engines. Find the final velocity of the rocket if the gas accounts for 25% of its initial mass.

Complete step by step solution needed.

Â© BrainMass Inc. brainmass.com February 24, 2021, 2:22 pm ad1c9bdddfhttps://brainmass.com/physics/velocity/momentum-rocket-moves-in-outer-space-final-velocity-if-gas-is-25-of-initial-mass-16281

#### Solution Summary

With good explanations and calculations, the problem is solved.

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