A car moves a distance of 200 𝑚. It covers first half of the distance at speed 60 𝑘𝑚ℎ−1 and the second half at speed 𝑣. If the average speed is 40 𝑘𝑚ℎ −1 , the value of 𝑣 is

April 12, 2022

by Ezee_Notes

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Physics Problems

Question : A car moves a distance of 200 𝑚. It covers first half of the distance at speed 60 𝑘𝑚ℎ−1 and the second half at speed 𝑣. If the average speed is 40 𝑘𝑚ℎ −1 , the value of 𝑣 is

(A) $30kmh^{-1}$

(B) $13kmh^{-1}$

(D) $40kmh^{-1}$

Answer : option (A)

Solution :

A car moves a distance of 200 𝑚. It covers first half of the distance at speed 60 𝑘𝑚ℎ−1 and the second half at speed 𝑣. If the average speed is 40 𝑘𝑚ℎ −1 , the value of 𝑣 is