Block A of mass $$2$$ kg is placed over a block B of mass $$8$$ kg. The combination is placed on a rough horizontal surface. If g $$=$$ $$l0$$ $$ms-2$$, coefficient of friction between B and floor $$=$$ $$0.5$$, , coefficient of friction between A and B $$=$$ $$0.4$$ and a horizontal force of $$10$$ N is applied on $$8$$ kg block, then the force of friction between A and B is

Question

Block A of mass $$2$$ kg is placed over a block B of mass $$8$$ kg. The combination is placed on a rough horizontal surface. If g $$=$$ $$l0$$ $$ms-2$$, coefficient of friction between B and floor $$=$$ $$0.5$$, , coefficient of friction between A and B $$=$$ $$0.4$$ and a horizontal force of $$10$$ N is applied on $$8$$ kg block, then the force of friction between A and B is

Infinity Learn · Accepted Answer

$$f=$$ μR $$=$$ μmg    |m is mass of the combination]f $$=$$ $$0.5$$ x $$l0x$$ $$l0N$$ $$=$$ $$50NSo$$, a force of $$10$$ N is unable to start the motion of the system. Therefore block A has no tendency to move over block B. So frictional force between A and B is zero .

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