When the car has completed 3 laps around the track, what is the magnitude of its

Question

When the car has completed 3 laps around the track, what is the magnitude of its displacement from the starting point? A) r B) 2r C) 6 pi r D) 2 pi r E) 0 A Canadian goose flew 845 km from Southern California to Oregon with an average speed of 28.0 m/s. How long, in hours, did it take the goose to make this journey? A) 27.7 h B) 8.33 h C) 66.1 h D) 7.70 h E) 8.38 h A landing airplane makes contact with the runway with a speed of 75.0 m/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 m/s^2, north (b) 2.11 m/s^2, south (c) 4.05m/s^2, north (d) 4.05 m/s^2, south (e) 14.3 m/s^2, north

Explanation / Answer

5) 0 returns to the same point

6) 845/(28*18/5) = 8.38 h

7) c) 4.05m/s^2 north

as a = 75/18.5

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