Remaining time: $29$:$27$

Question $1$

A $6\mathrm{.}00-$kg block is in contact with a $4\mathrm{.}00-$kg block rough surface as shown in the figure. Total friction force acts on the blocks is $10N.$ The $6\mathrm{.}00-kg$ block is being pushed by a horizontal $20\mathrm{.}0-N$ force as shown. What is the friction coefficient? $g=10\frac{m}{s^2}$

A$)0\mathrm{.}1$

B$)0\mathrm{.}4$

C$)0\mathrm{.}5$

D$)0\mathrm{.}6$ E$)0\mathrm{.}8$