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***1)An airplane starts from rest and accelerates at a constant 3.00 m/s2 for 30.0 s before leaving the ground. What is its displacement during this time?

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s=1/2at²+v(initial)ts=1/2(3)(30)²+(0)(30)s=1/2(3)(30)²+0s=900(1/2)(3)s=450(3)s=1350m

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