WB JEE 2026 | Laws of Motion Question 5 | Physics

WB JEE 2026

MCQ (More than One Correct Answer)

-0.25

Three blocks of masses $m_1=2 \mathrm{~kg}, m_2=3 \mathrm{~kg}$ and $m_3=5 \mathrm{~kg}$ are placed on a horizontal frictionless surface and a force of 30 N pulls the system as shown below．The value of tension $T$ will be

15 N

30 N

6 N

10 N

WB JEE 2025

MCQ (More than One Correct Answer)

-0

Two spheres $S_1$ and $S_2$ of masses $m_1$ and $m_2$ respectively collide with each other. Initially $S_1$ is at rest and $S_2$ is moving with velocity $v$ along $x$-axis. After collision $S_2$ has a velocity $\frac{v}{2}$ in a direction perpendicular to the original direction. The sphere $S_1$ moves after collision

with a velocity of magnitude $\frac{m_2}{m_1} v \frac{\sqrt{5}}{2}$.

with a velocity in the direction $\theta=\tan ^{-1}\left(-\frac{1}{3}\right)$ to the $x$-axis.

with a velocity whose direction makes an angle $\theta$ with the $x$-axis such that $\theta=\tan ^{-1}\left(\frac{1}{2}\right)$ or $\theta=\tan ^{-1}\left(-\frac{1}{2}\right)$.

with a velocity of magnitude $\frac{m_1}{2 m_2} v \sqrt{5}$.

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