A car travels 30 m toward the east, then it takes a turn and travels 40 m towards the west. It takes 50 seconds. Its average velocity?
Correct answer: B. -1/5 m/s
- A. -10 m/s
- B. -1/5 m/s
- C. 7/5 m/s
- D. -5 m/s
Explanation
Velocity=displacement per timeDisplacement would be 30-40=-10m since the car first travels 30m towards the east and then 40m towards the west.Time taken was 50 secondsHence v=-10/50, which equals "-1/5 m/s."
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