The most efficient way to send a spacecraft from the earth to another planet is to use
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(a) For a flight from earth to Mars, in what direction must the rockets be fired at the earth and at Mars: in the direction of motion or opposite the direction of motion? What about for a flight from Mars to the earth?
(b) How long does a one-way trip from the earth to Mars take, between the firings of the rockets?
(c) To reach Mars from the earth, the launch must be timed so that Mars will be at the right spot when the spacecraft reaches Marss orbit around the sun. At launch, what must the angle between a sunMars line and a sunearth line be? Use Appendix F.
Figure P13.79
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University Physics with Modern Physics
ISBN: 978-0133977981
14th edition
Authors: Hugh D. Young, Roger A. Freedman
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