An astronaut in his space suit and with a propulsion unit (empty of its gas prop

Question

An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 146 kg. The astronaut begins a space walk at rest, with a completely filled propulsion unit. During the space walk, the unit ejects some gas with a velocity of +32 m/s. AS a result, the astronaut recoils with a velocity of -.39 m/s. After the gas is ejected, the mass of the astronaut is 165 kg. what percentage of the gas was ejected from the completely filled propulsion unit?

Explanation / Answer

0 = m*32 + 165*-39,,,,,,,,,,m=205.9 kg,,,,,,,,,,,, percentage of the gas was ejected from the completely filled propulsion unit=205.9/370.9 =55.5 %

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