Physics - NLM Question with Solution | TestHub

A board of mass $m=1$ kg lies on a table and a weight of $M=2$ kg on the board. What minimum force $F$ must be applied on the board in order to pull it out from under the load? The coefficient of friction between the load and the board is ${\mu }_1=0.25$ and that between board and table is ${\mu }_2=0.5$: (Take $g=10$ m/s²)