Author Question: A rocket coasts in an elliptical orbit about Earth. To attain escape velocity using the least amount ... (Read 11 times)

mikaylakyoung · **on:** Jul 29, 2018

A rocket coasts in an elliptical orbit about Earth. To attain escape velocity using the least amount of fuel in a brief firing time, should it fire off at the apogee, or at the perigee? (Hint: Let Fd = KE guide your thinking.)

A) perigee, where it is closest and fastest
B) apogee, where it is farthest and slowest
C) same at either location
D) same at any location

Question 2

Escape speed from the Moon is

A) about the same as from Earth.
B) much greater than from Earth.
C) much less than from Earth.