1.

A person travels along a straight road for the first half length with a velocity v_(1)and the second half length with velocityv_(2). What is the mean velocity of the person ?

Answer»

`(2)/(V)=(1)/(v_(1))+(1)/(v_(2))`
`V=(V_(1)+v_(2))/(2)`
`V=sqrt(v_(1).v_(2))`
`vecV_(1)+vecV_(2)`

Solution :AR. VELOCITY
`V= (S_(1)+S_(2))/(t) = ((V_(1)t)/(2)+(V_(2)t)/(2))/(t)`
`V_(1)=(S_(1))/(t//2), V_(2)=(S_(2))/(t//2)`
`=(V_(1)+V_(2))/(2)`


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