An airplane moves 140 m/s as it travels around a vertical circular loop which has a 1.0-km radius. What is the magnitude of the resultant force on the 70-kg pilot of this plane at the bottom of this loop?
A. 2.1 kN
B. 1.4 kN
C. 0.69 kN
D. 1.5 kN
E. 1.3 kN
Answer: B
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