A block of mass 5 kg is (i) pushed in case (A) and (ii) pulled in case (B), by a force $F=20 \mathrm{~N}$, making an angle of $30^{\circ}$ with the horizontal, as shown in the figures. The coefficient of friction between the block and floor is $\mu=0.2$. The difference between the accelerations of the block, in case (B) and case (A) will be : ( $g=10 \mathrm{~ms}^{-2}$ )