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jeka57 [31]
3 years ago
15

A car travels from point a to point b, moving in the same direction but with a non-constant speed. the first half of the distanc

e, the car travels with a speed v_1v ​1 ​​ . the remaining part of the way, the car travels half the time with a speed v_2v ​2 ​​ and half the time with a speed v_3v ​3 ​​ . what is the average speed over the entire journey
Physics
2 answers:
Naddik [55]3 years ago
6 0
You have to devide and add evreythuy butthe answer is 464
Ira Lisetskai [31]3 years ago
5 0

Answer:

\frac{4v_1v_2v_3}{2v_2v_3+v_1v_2+v_1v_2}

Explanation:

The average speed is given by:

v_{avg}= \frac{\text{total distance}}{\text{total time taken}}

let the total distance be d

time taken in first part of the journey= t₁

t_1 = \frac{d/2}{v_1}

time taken in second part of the journey= t₂

t_2 = \frac{d/4}{v_2}

time taken in third part of the journey= t₃

t_3 = \frac{d/4}{v_3}

v_{avg}= \frac{d}{t_1+t_2+t_3}=\frac{d}{\frac{d/2}{v_1}+\frac{d/4}{v_2}+\frac{d/4}{v_3}}

v_{avg}=\frac{4v_1v_2v_3}{2v_2v_3+v_1v_2+v_1v_2}

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