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Q.

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

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a

μmMg

b

μmgM+m

c

3μmgM

d

2μmgM+m

answer is A.

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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