Planet a Has Nine Times the Mass of Planet B,but

question 45

Multiple Choice

Planet A has nine times the mass of planet B,but they have equal radii.How fast would you have to launch a rocket from planet A for it to escape the pull of its gravity,if the corresponding speed for planet A is 10 m/s?

• A) 3 m/s
• B) 10 m/s
• C) 30 m/s
• D) 90 m/s

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