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college physics

an airplane starts from rest and accelerates at a constant 3.00m/s2 for 30.0s before leaving the ground.
a). how far did it move?
b). how fast was the airplane going when it took off?

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  1. a. d = 0.5a*t^2.
    d = 0.5*3*30^2 = 1350 m.

    b. V = a*t = 3 * 30 = 90 m/s.

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  2. An airport runaway is 150 n long an airplane accelerates at 2 m/ sec 2
    a, what is the final speed of the plane if it covers the entire runaway?

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  3. An airplane starts from rest and accelerates east at a constant rate of 3 m/s2 for 30 seconds.
    What is the displacement

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