If a particle travels a linear distance at speed `v_(1)` and comes back along the same track at speed `v_(2)`.

If a particle travels the first half distance with speed v_(1) and second half distance with speed v_(2) . Find its average speed during journey.

If a particle travels the first half distance with speed v_(1) and second half distance with speed v_(2) . Find its average speed during journey.

If a paritcle travels distance S_2 and s-2 with speeds v_1 and vec _2 in the same direction, then average speed of the particle is …………………………………. .

A particle covers half of its total distance with speed v_(1) and the rest half distance with speed v_(2) Its average speed during the complete journey is

If particle travels n equal distances with speeds v_(1), v_(2),…v_(n) , then the average speed vec v of the particle will be such that .

If particled travels n equal distances with speeds v_(1), v_(2),…v_(n) , then the average speed vec v of the particle will be such that .

A girl travels along a straight road due east for the first half distance with speed v_(1) and the second half distance with speed v_(2) . What is the average speed of the girl ?