Question

Two curs 1 & 2 starting from rest are moving With speeds $V_1$ and $V_2 \,m/s (V_1 > V_2)$ Car 2 is ahead of car '1' by s meter when the driver of the car 1 sees car '2'. What minimum retardation should be given to car '1' to avoid collision

• A. $\frac{V_1 - V_2}{S}$
• B. $\frac{V_1 + V_2}{S}$
• C. $\frac{(V_1 + V_2)^2}{2S}$
• D. $\frac{(V_1 - V_2)^2}{2S}$

Answer 1

Answer: (D)

$\frac{(V_1 - V_2)^2}{2S}$

Answer 2

Relative velocity = $( \nu_1 - \nu_2) = \nu$ and $\nu^2 - u^2 = 2as (u = 0)$