An airplane lands with an initial velocity of 70.0 m/s and then decelerates at 1.50 m/s 2

Question:

An airplane lands with an initial velocity of 70.0 m/s and then decelerates at 1.50 m/s2 for 40.0 s. What is its final velocity?

Strategy
Draw a sketch. We draw the acceleration vector in the direction opposite the velocity vector because the plane is decelerating.v0 = 70.0 m/s a = -1.50 m/s Uf = ? X

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