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A car complete the first half of its jou...

A car complete the first half of its journey with speed `v_1`, and the rest half with speed `v_2`. The average speed of the car in whole journey:

A

`(2v_(1)v_(2))/(v_(1)+v_(2))`

B

`(v_(1)+v_(2))/(2)`

C

`sqrt(v_(1)v_(2))`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
The average velocity is the Harmonic mean of `v_(1) and v_(2)`.
`therefore "Average Velocity" =(2v_(1)v_(2))/(v_(1)+v_(2))`
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