Question

A car travelling on a straight track moves with a uniform speed V, for half of the time and with a uniform
speed V, for rest of the time. The average speed is
​

Answer 1

Answer:

Let each time interval be t.

Displacement covered in first time interval, d

1 =v 1 t

Displacement covered in second time interval, d 2

=v 2 t

Total displacement d=d 1 +d 2

=(v 1 +v 2 )t

Total time t=t+t=2tAverage velocity V avg =

2t(v 1 +v 2 )t

= 2v 1 +v 2

Explanation:

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