Two blocks each of mass \( 1 \mathrm{~kg} \) are placed as shown. They are connected by a string which passes over a smooth (massless) pulley.
There is no friction between \( m_{1} \) and the ground. The coefficient of friction between \( m_{1} \) and \( m_{2} \) is \( 0.2 \). A force \( F \) is applied to \( m_{2} \). Which of the following statements is/are correct?
(a) The system will be in equilibrium if \( F \leq 4 \mathrm{~N} \)
(b) If \( F4 \mathrm{~N} \) tension in the string will be \( 4 \mathrm{~N} \)
(c) If \( F4 \mathrm{~N} \) the frictional force between the blocks will be \( 2 \mathrm{~N} \)
(d) If \( F=6 \mathrm{~N} \) tension in the string will be \( 3 \mathrm{~N} \)
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