Question

An object moves x distance with speed v₁ and next x distance with speed v₂. The average velocity v is related to v₁ and v₂ as

(1) \(V=\left(\frac{V_1+V_2}{2}\right)\)

(2) \(\frac{1}{V}=\frac{1}{V_1}+\frac{1}{V_2}\)

(3) \(V=\left(\frac{2V_1V_2}{V_1+V_2}\right)\)

(4) \(V=\left(\frac{V_1-V_2}{2}\right)\)

Answer 1

(3) \(V=\left(\frac{2V_1V_2}{V_1+V_2}\right)\)