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1. A body describes the first half of the total 1distance with velocity v, and the secondhalf with velocity v2. The averagevelocity is: |
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Answer» Let assume the distance be 2X. By the question , AVERAGE VELOCITY (V)= TOTAL DISPLACEMENT / TIME TAKEN Total displacement = 2X Have to find time taken for the V1 and V2. time taken for the first half = X/V1 time taken for the next half = X/V2. substitute value in AVERAGE VELOCITY V =2S/(X/V1 + X/V2) take "x" common and take L.C.M V= 2S /X( V1 + V2 )/V1 V2 V= 2S (V1 V2)/ X (V1 + V2). |
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