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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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