A landing airplane makes contact with the runway with a speed of \( 78.0 \mathrm{~m} / \mathrm{s...
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0A landing airplane makes contact with the runway with a speed of \( 78.0 \mathrm{~m} / \mathrm{s} \) and moves toward the south. After \( 18.5 \) seconds, the airplane comes to rest. What is the average acceleration of the airplane during the landing?
(A) \( 2.11 \mathrm{~m} / \mathrm{s}^{2} \), north
(B) \( 4.22 \mathrm{~m} / \mathrm{s}^{2} \), north
(C) \( 2.11 \mathrm{~m} / \mathrm{s}^{2} \), south
(D) \( 4.22 \mathrm{~m} / \mathrm{s}^{2} \), south
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