Question

If a body covers first half of its journey
with uniform speed v and the second half
of the journey with uniform speed v then
the average speed is
2,​

Answer 1

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Answer 2

Answer:

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Explanation:

Avg speed=

total distance covered/ total time taken

Suppose the total distance=s

Time taken for first half t1=distance/speed=(s/2)/v1

=S/2v1

Time taken for second half=s/2v2

Total time=s/2v1)+(s/2v2)=s/2(1/v1+1/v2)

=S(v1+v2)/2v1v2

Avg speed= S/ total time taken

By solving this you get

Avg speed=2v1v2/(v1+v2)