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1. The Orion launch-abort system can lift the crew module with a

thrust 15 times its weight.  How long a "burn" is needed to lift the

crew 300m vertically?

 

   A.  0.1 second

   B.  1.0 second

   C.  2.0 second    

   D.  5.0 second

   E.  20.0 second

 

2. The booster Ares I attains a speed of Mach 6 in two and one-half

minutes.  Mach 1 is 340 m/s (speed of sound).  What is its

acceleration?

 

   A.  0.1 m/s2

   B.  10  m/s2

   C.  14  m/s2   

   D.  90  m/s2

   E.  200 m/s2

 

3.  The Earth return module has mass M, velocity v, and enters the

atmosphere at an altitude of h = 200 km.  How much heat energy is

generated before landing?

 

   A.  2 Mv

   B.  Mv / h

   C.  ½Mv2 + Mgh     

   D.  Mgh

   E.  ½Mv2

 

4.  The escape velocity from Earth is 11.2 km/s.  If the Moon's mass

is 0.0123 that of Earth's mass, and the Moon's radius is 0.273 that

of Earth's, what is the escape velocity from the Moon?

 

   A.  0.13  km/s

   B.  0.30  km/s

   C.  0.43  km/s

   D.  2.4   km/s    

   E.  11.2  km/s

 

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