A car travels 30 m towards east, then it takes turn and travels 40 m towards north. It takes 50 seconds in total. Its average velocity is:
Correct answer: B. 1 m/s
- A. 7/5 m/s
- B. 1 m/s
- C. 1/5 m/s
- D. 5 m/s
Explanation
Average Velocity = Total displacement/total timeThe car first travels 30m East and then travels 40m NorthThe net displacement, d (From Triangle Law of vector addition)=d2 = 302 + 402d2 = 900 + 1600d2 = 2500d = 50mTherefore:Average velocity = 50/50 which equals to 1 m/s.
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