Question:
A ship moves with a speed of 3 m/sec due east; and then it turns trough 90 degree due north and cover the same distance with speed of 4 m/sec. Calculate its average Velocity..
Answer:
The average velocity is given by Total displacement /Total time taken
Total displacement = (AC) = √(AB)2 +(BC)2 = √x2 + x2 = x√2
Total time for AB = Distance/ Speed = x/3 sec
Total time for BC = Distance / Speed = x/4 sec
Total time = x/3 + x/4 = 7x/12
Average velocity = x√2 / 7x/12 = 12√2 / 7 m/s
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