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![JEE Advanced 2024 Paper 2 Online Physics - Wave Optics Question 1 English Comprehension](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lwpxavml/8654284c-3589-402d-a17d-6d0777ba0c03/5e1a64d0-1cae-11ef-a7f1-8b6b33c30c4d/file-6y3zli1lwpxavmm.png?format=png)
Two particles, 1 and 2, each of mass $m$, are connected by a massless spring, and are on a horizontal frictionless plane, as shown in the figure. Initially, the two particles, with their center of mass at $x_0$, are oscillating with amplitude $a$ and angular frequency $\omega$. Thus, their positions at time $t$ are given by $x_1(t)=\left(x_0+d\right)+a \sin \omega t$ and $x_2(t)=\left(x_0-d\right)-a \sin \omega t$, respectively, where $d>2 a$. Particle 3 of mass $m$ moves towards this system with speed $u_0=a \omega / 2$, and undergoes instantaneous elastic collision with particle 2 , at time $t_0$. Finally, particles 1 and 2 acquire a center of mass speed $v_{\mathrm{cm}}$ and oscillate with amplitude $b$ and the same angular frequency $\omega$.
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