A projectile that is fired vertically at 8 km/s from Earth's ...

[lbcchick]

A projectile that is fired vertically at 8 km/s from Earth's surface will
 
  A) go into circular orbit about Earth.
  B) rise and fall back to Earth's surface.
  C) follow an uncertain path.
  D) escape from Earth.

Question 2

A satellite is in circular orbit at an altitude of 1500 km above the surface of a nonrotating planet with an orbital speed of 9.2 km/s.
 
  The minimum speed needed to escape from the surface of the planet is 14.9 km/s, and G = 6.67  10-11 N  m2/kg2. The orbital period of the satellite is closest to
  A) 72 min.
  B) 65 min.
  C) 58 min.
  D) 51 min.
  E) 44 min.

[meryzewe]

Answer to Question 1

Answer: B

Answer to Question 2

A

[lbcchick]

Thank you!

[meryzewe]

Always glad to help...