Neglecting air resistance, a 1.0-kg projectile has an escape velocity of about 11 km/s at the surface of Earth. The corresponding escape velocity for a 2.0 kg projectile is:
A) 3.5 km/s
B) 5.5 km/s
C) 7.1 km/s
D) 10 km/s
E) 11 km/s
Correct Answer:
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