A block of mass M is being pulled along rough horizontal surface. The coefficient of friction between the block & surface is mu. If another block of mass M/2 is placed on the block & it is again pulled on the surface. The coefficients of friction between the block and surface will be

A block of mass M is being pulled along rough horizontal surface. The

1.	A block of mass M is being pulled along rough horizontal surface. The coefficient of friction between the block & surface is mu. If another block of mass M/2 is placed on the block & it is again pulled on the surface. The coefficients of friction between the block and surface will be
Answer» `MU` `3mu//2` `mu//2` `2MU` ANSWER :A