Question

A person travels along a straight road for half the distance with velocity $v _ { 2 }$ The average velocity is given by

• A. $v _ { 1 } v _ { 2 }$
• B. $\frac { v _ { 2 } ^ { 2 } } { v _ { 1 } ^ { 2 } }$
• C. $\frac { v _ { 1 } + v _ { 2 } } { 2 }$
• D. $\frac { 2 v _ { 1 } v _ { 2 } } { v _ { 1 } + v _ { 2 } }$

Answer 1

Answer: (D)

$\frac { 2 v _ { 1 } v _ { 2 } } { v _ { 1 } + v _ { 2 } }$

Answer 2

As the total distance is divided into two equal parts therefore distance averaged speed $= \frac { 2 v _ { 1 } v _ { 2 } } { v _ { 1 } + v _ { 2 } }$