Question

A huge cannon is assembled on an airless planet. The planet has a radius of 5.0×10^6m and a mass of 2.6×10^24kg. The cannon fires a projectile straight up at 4400 m/s .

A) What height does the projectile reach above the surface?

I got 1.94*10^6 correct.

B) An observation satellite orbits the planet at a height of 1000 km . What is the projectile's speed as it passes the satellite?

answer in m/s

Answer 1