Test Academy | A block of mass m is placed on another block of mass M which itself is lying on a horizontal surface. The coefficient of friction between the two blocks is μ1 and that between the block of mass M and horizontal surface is μ2 . What maximum horizontal force can be applied to the lower block so that the two blocks move without separation (M+m)(μ2-μ1)g, (M-m)(μ2-μ1)g, (M-m)(μ2+μ1)g, (M+m)(μ2+μ1)g

Question

A block of mass m is placed on another block of mass M which itself is lying on a horizontal surface. The coefficient of friction between the two blocks is μ1 and that between the block of mass M and horizontal surface is μ2 . What maximum horizontal force can be applied to the lower block so that the two blocks move without separation

Options :

(M+m)(μ2-μ1)g
(M-m)(μ2-μ1)g
(M-m)(μ2+μ1)g
(M+m)(μ2+μ1)g

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