A truck starts from rest and accelerates uniformly with 5m/s² . The minimum value of coefficient of static friction between surface of truck and a box placed on it such that box does not slip back, will be

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0.8

0.2

0.5

0.4

answer is C.

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Detailed Solution

In the frame of the truck there will be a Pseudo force ( F_p ) = friction
$\begin{array}{l} ma = μmg \\ μ = \frac{a}{g} = \frac{5}{10} = 0 .5 \end{array}$

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