A satellite is in circular orbit at an altitude of 2300 km above ...

[kaid0807]

A satellite is in circular orbit at an altitude of 2300 km above the surface of a nonrotating asteroid with an orbital speed of 5.9 km/s.
 
  The minimum speed needed to escape from the surface of the asteroid is 14.6 km/s, and G = 6.67  10-11 N  m2/kg2. The mass of the asteroid is closest to
  A) 1.8  1024 kg.
  B) 3.6  1024 kg.
  C) 2.7  1024 kg.
  D) 8.9  1023 kg.
  E) 1.3  1024 kg.

Question 2

A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.0 above the horizontal. The ball leaves her hand 1.00 m above the ground and experience negligible air resistance.
 
  (a) What is the magnitude of the ball's velocity just before it hits the ground?
  (b) At what angle below the horizontal does the ball approach the ground?

[choc0chan]

Answer to Question 1

A

Answer to Question 2

(a) 9.14 m/s (b) 47.9