Two blocks of masses m and $$2m$$ are placed one over the other as shown in figure. The coefficient of friction between m and $$2m$$ is μ and between $$2m$$ and ground is μ$$3$$. If a horizontal force F is applied on upper block and T is tension developed in string, then choose the incorrect alternative.

Question

Two blocks of masses m and $$2m$$ are placed one over the other as shown in figure. The coefficient of friction between m and $$2m$$ is μ and between $$2m$$ and ground is μ$$3$$. If a horizontal force F is applied on upper block and T is tension developed in string, then choose the incorrect alternative.

Infinity Learn · Accepted Answer

$$f1$$ $$=$$ maximum value of friction between m and $$2m$$ $$=$$ μ$$mgf2$$ $$=$$ maximum value of friction between $$2m$$ and ground   $$=$$ μ$$3(3m)g$$ $$=$$ μmgNow, let us draw free body diagram of m and $$2m$$ in all four cases. (i)      (ii)  (iii)  (iv)

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Two blocks of masses m and 2m are placed one over the other as shown in figure. The coefficient of friction between m and 2m is μ and between 2m and ground is μ3. If a horizontal force F is applied on upper block and T is tension developed in string, then choose the incorrect alternative.

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