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Questions  

A plate of mass (M) is placed on a horizontal frictionless surface and a body of mass (m) is placed on this plate. The coefficient of dynamic friction between this body and the plate is μ. If a force 3μmg is applied to the body of mass (m) along the horizontal, the acceleration of the plate will be

a
μmMg
b
μmgM+m
c
3μmgM
d
2μmgM+m

detailed solution

Correct option is A

fr=μmg=Ma⇒a=μmgM

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