Question

a vehicle travel along a straight path between two places A and B.It travels first half of the distance with a velocity of 72km/h and the remaining half with a velocity of 36km/h.what is the average velocity of the vehicle in m/s.

Answer 1

Given :-

A vehicle travelling from place A to place B

velocity in first half = 72 km/h = 20 m/s

velocity in second half = 36 km/h = 10 m/s

To find :-

average velocity of the vehicle

Solution :-

Let the average velocity be $v_{av}$

Let velocity in first half be considered as $v_{1}$

Let velocity in second half be considered as $v_{2}$

$v_{av} =\frac{v_{1}+v_{2}}{2}$

$v_{av} =\frac{20+10}{2}$

$v_{av} = \frac{30}{2}$

$v_{av}=15$

Conclusion :-

Therefore, the average velocity of the vehicle was 15 m/s or 54 km/h