After what time when they were released from rest, shall the blocks collide for the first time

\frac{π}{2} \sqrt{\frac{m}{k}}

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π \sqrt{\frac{m}{k}}

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\frac{π}{3} \sqrt{\frac{m}{k}}

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None of these

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Solution

The correct option is C None of these
For $P,$ $T_{1} = π \sqrt{\frac{m}{k}}$ $(∴ x = \frac{A}{2})$
For $Q,$ $T_{2} = 2 π \sqrt{\frac{m}{k}}$ $(∴ x = A)$
The time at which they will collide is
$T = T_{1} + T_{2} = 3 π \sqrt{\frac{m}{k}}$
$∴$ None of these.

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After what time when they were released from rest, shall the blocks collide for the first time

The correct option is C None of theseFor P, T1=π√mk(∴x=A2)For Q, T2=2π√mk (∴x=A)The time at which they will collide isT=T1+T2=3π√mk∴ None of these.

The correct option is C None of these
For $P,$ $T_{1} = π \sqrt{\frac{m}{k}}$ $(∴ x = \frac{A}{2})$
For $Q,$ $T_{2} = 2 π \sqrt{\frac{m}{k}}$ $(∴ x = A)$
The time at which they will collide is
$T = T_{1} + T_{2} = 3 π \sqrt{\frac{m}{k}}$
$∴$ None of these.