Starting from rest, a 20,000-kg aircraft being launched from an aircraft carrier goes from 0 to 90 m/s in 2 seconds. The net force acting on the aircraft is
a. 3,600,000 N. b. 1,800,000 N.
c. 900,000 N. d. 450,000 N.
e. 275,000 N.
c
RATIONALE: F = ma; a = change in velocity/change in time = 90 m/s / 2 seconds = 45 m/s2 F = 20,000 kg x 45 m/s2 = 900,000 N
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