Multiple choice

Two cars $A$ and $B$ are moving in same direction. Car $A$ is moving with speed $10\ m/s$ and at a distance $80\ m$ behind car $B$ which starts from rest and with uniform acceleration $a_{o}$. The maximum value of $a_{o}$ for which car $A$ can reach bar $B$

  1. $\dfrac{1}{8}m/s^{2}$
  2. $\dfrac{7}{8}m/s^{2}$
  3. $\dfrac{5}{16}m/s^{2}$
  4. $\dfrac{3}{8}m/s^{2}$
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C Correct answer