In the arrangement shown, There is no friction between the $$4$$ kg block and the floor and friction exists at the interface of $$2kg$$ and $$4kg$$ blocks. If the blocks A and B move together without any relative motion between them, find the work done by the force of friction on block A in $$2$$ second

Question

Infinity Learn · Accepted Answer

Accelaration of the system, $$a=242+4m/s2=4m/s2Friction$$ force acting on $$2kg$$ block, f $$=$$ $$2$$ x $$4$$ $$n=8$$ NDisplacement of the system of blocks , $$x=12$$×$$4$$×$$22m=8m$$∴ Work done by the friction on A $$=f$$.$$x=8$$ x $$8$$ $$J=64$$ J

In the arrangement shown, There is no friction between the 4 kg block and the floor and friction exists at the interface of 2kg and 4kg blocks. If the blocks A and B move together without any relative motion between them, find the work done by the force of friction on block A in 2 second

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