Question

During a journey from earth to the moon and back, the greatest energy required from the space-ship rockets is to overcome 

(a) The earth’s gravity at take off 

(b) The moon’s gravity at lunar landing 

(c) The moon’s gravity at lunar take off 

(d) The point where the pull of the earth and moon are equal but opposite 

Answer 1

During a journey from earth to the moon and back, the greatest energy required from the space-ship rockets is to overcome The earth’s gravity at take off.