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A person travels along a straight road for the first half time with a velocity v1 and the second half time with a velocity v2. Then the mean velocity vis given by |
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Answer» Let the total DISTANCE be d. Time taken for the FIRST half half distance is t 1 = 2V 1 d Time taken for the second half of the distance is t 2 = 2v 2 d MEAN velocity = total time total distance v mean = 2v 2 d + 2v 1 d d v mean = v 1 +v 2 2v 1 v 2 ⇒ v mean 2 = v 1 1 + v 2 1 GIVEN, v mean =v ⇒ v 2 = v 1 1 + v 2 1 Explanation: |
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