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13.Oscillations
medium
In the figure shown, there is friction between the blocks $P$ and $Q$ but the contact between the block $Q$ and lower surface is frictionless. Initially the block $Q$ with block $P$ over it lies at $x=0$, with spring at its natural length. The block $Q$ is pulled to right and then released. As the spring - blocks system undergoes $S.H.M.$ with amplitude $A$, the block $P$ tends to slip over $Q . P$ is more likely to slip at
A
$x=0$
B
$x=+A$
C
$x=+\frac{A}{2}$
D
$x=+\frac{A}{\sqrt{2}}$
Solution
(b)
The block is most likely to slip when there is maximum acceleration.
This happens when the blocks are at the extremities where the displacement is either $+A$ or $-A$.
Standard 11
Physics
