A car completes the first half of its journey with a velocity `upsilon_(1)` and the rest half with a velocity `upsilon_(2)`. Then the average velocity of the car for the whole journey is :

Options

A. `v=sqrt(v_1 v_2)`
B. `v=sqrt((v_2)/(v_1))`
C. `(2)/(v)=(1)/(v_1)+(1)/(v_2)`
D. `v=(v_1 +v_2)/(2)`

Answer

d

Explanation

`V_(av)=("total distance")/("total time")=(V_(1)xxt/2+V_2xxt/2)/(t)=(V_(1)+V_2)/(2)`