A Rocket Is Fired in a Gravity-Free Environment in Deep

question 32

Multiple Choice

A rocket is fired in a gravity-free environment in deep space. The rocket has an initial mass of 8000 kg and ejects gas with a velocity of 2000 m/s. How much gas must be ejected in the first second to give the rocket an acceleration of 30.0 m/s²?

• A) 120 kg
• B) 7.50 kg
• C) 15.0 kg
• D) 12.0 kg
• E) 150 kg

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