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A body describes the first half of the t...

A body describes the first half of the total distance with velocity `v_1` and the second half and velocity `v_2`.Calculate the average velocity.

Text Solution

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Let total distance=2x. Then
total time taken `=(x_1)/(v_1)+(x)/(v_2)=x((v_1+v_2)/(v_1v_2))`
`:.` Average speed`=(2x)/(x((v_1+v_2)/(v_1v_2)))=(2v_1v_2)/(v_1+v_2)`
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