An astronaut lands on a previously unknown planet of radius 2350. ...

[cagreen833]

An astronaut lands on a previously unknown planet of radius 2350. km and she measures the acceleration of gravity to be 3.20 m/s2.
 
  (a) What is the mass of this new planet?
  (b) What does the astronaut weigh on this new planet if she weighs 384. N on Earth?

Question 2

What is the minimum energy needed to lift 1.0 kg to a height of 200. km and to give it a speed of 8.0 km/s? (Neglect the small decrease of g over that distance.)
 
  A) 34. TJ
  B) 34. kJ
  C) 34. MJ
  D) 34. GJ
  E) 34. J

[wergv]

Answer to Question 1

(a) 0.26  1024 kg
(b) 125. Newtons

Answer to Question 2

C

[cagreen833]

Great answer, keep it coming

[hramirez205]

Thanks for the timely response, appreciate it