Question

a body cover half of it jounery with v1 speed and next half with v2 speed calculate the average speed

Answer 1

Hii friend,

Here is your answer_______________

We know that,

Average speed => total distance/total time

To find time:-

Time (T1) = distance/velocity

Let "d" be the distance and "v1" be the velocity.

T1 = d/v1

:- time for next journey is

T2 = d/v2

Total time => T1 +T2

Total time => d (1/v1 +1/v2)

Total time => d(v1 +v2/v1 v2)

Total distance =>d +d => 2d

Average speed = 2d(v1 v2)/d(v1+ v2)

Average speed => 2(v1 v2)/(v1 + v2).

Hope this helps you a little!!!