A block P of mass m is placed on a ...
Question
A block P of mass m is placed on a horizontal frictionless plane. A second block of same mass m is placed on it and is connected to a spring of spring constant k, th
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A block ( P ) of mass ( m ) is placed on a horizontal frictionless plane. A second block of same mass ( mathrm{m} ) is placed on it and is connected to a spring of spring constant ( mathrm{k} ), the two blocks are pulled by a distance A. Block Q oscillates without slipping. What is the maximum value of frictional force between the two blocks?

(a) ( mathrm{kA} / 2 )
(b) kA
(c) ( mu_{mathrm{s}} mathrm{mg} )
(d) zero

JEE/Engineering Exams
Physics
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A block P of mass m is placed on a horizontal frictionless plane. A second block of same mass m is placed on it and is connected to a spring of spring constant k, the two blocks are pulled by a distance A. Block Q oscillates without slipping. What is the maximum value of frictional force between the two blocks?
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Frictional force ( cdot F=m f(f rightarrow operatorname{ach} o f(operatorname{tg} S H M) )
( therefore quad F=m omega^{2} A )
( therefore omega=sqrt{frac{K}{m+m}}=sqrt{frac{K}{2 m}} )
[
F=m times frac{K}{2 m} times A=frac{1}{2} K A
]

Ans (a) frac{KA}{2}

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