As an airplane is taking off at an airport its position is closely monitored by radar. The following three positions are measured with their corresponding times:
x1 = 320.86 m at t1 = 4.40 s,
x2 = 382.01 m at t2 = 4.90 s,
x3 = 448.66 m at t3 = 5.40 s.
What is the acceleration of the airplane at t2 = 4.90 s? (Assume that the acceleration of the airplane is constant.)
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The answer is C