Physics Gravitation Level: Misc Level

You are on an airplane traveling with a constant velocity at an altitude of20,000 m. What is the acceleration of gravity at that altitude?The radius of Earth is 6.37x10 to power of (6) m.

a. 9.81 m/s squared

b.9.78 m/s squared

c.9.75 m/s squared

d.9.72 m/s squared