Question

A body moves with a uniform velocity v1 for sometime and with uniform velocity v2 for the next equal time . the average velocity iss​

Answer 1

Explanation:

average velocity=v2-v1/t

Answer 2

During first phase, time taken=x/v1

during second phase time taken=x/v2

Total distance=2x

Total time taken= x/v1+x/v2

=x[1/v1+1/v2]

Average velocity=2x/x[1/v1+1/v2]v=2/1/v1+1/v22/v=1/v1+1/v2