Question: You have been visiting a distant planet. Your measurements have determined that the planets mass is twice that of earth but the free-fall acceleration at

You have been visiting a distant planet. Your measurements have determined that the planet’s mass is twice that of earth but the free-fall acceleration at the surface is only one-fourth as large.
a. What is the planet’s radius?
b. To get back to earth, you need to escape the planet. What minimum speed does your rocket need?

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