A body travelling between two positions travels first half of the distance with speed v₁ and the next half of the distance with speed v₂. The average speed of total motion is

Let x be the total distance between two positions.

Let t₁ be the time for first half and t₂ be the time for the next half of the distance

A body is travelling between two positions A, B. It travels from A to B with speed v₁ and then from B to A in the same path with speed v₂. The average speed of total motion is

A body is travelling between two positions. The total distance is divided into n equal parts. These parts are travelled with speed v₁, v₂, v₃ ..... v_n respectively. The average speed of total motion is such that

A body travelling between two positions travels with speed v₁ for time t₁ and then with speed v₂ for time t₂. For the total motion,

Average speed =

A body travelling between two positions travels first half of the time with speed v₁ and the next half of the time with speed v₂. The average speed of total motion is

A body travelling between two positions travels for the time intervals t₁, t₂, t₃ ...... t_n with speeds v₁, v₂, v₃ ...... v_n respectively.