Question

A vehicle travels half the distance L with speed V1 and the other half with speed V2 what is the average speed.​

Answer 1

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Let the vehicle travels from A to B. To calculate average speed we will calculate total distance covered and will divide by time interval in which it covers that total distance.

Time taken to travel first half distance t

1

=

v

1

2

L

=

2v

1

L

Time taken to travel first half distance t

1

=

v

2

2

L

=

2v

2

L

Total time taken=t

1

+t

2

=

2v

1

L

+

2v

2

L

=

2

L

[

v

1

1

+

v

2

1

]

We know that v

av

=Average speed=

totaltime

totaldistance

v

av

=

2

L

[

v

1

1

+

v

2

1

]

L

=

v

1

+v

2

2v

1

v

2

I hope you satisfied