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JEE MAIN 2020
02-09-20 S1
Question
A particle of mass $m$ with an initial velocity $u \hat{i}$ collides perfectly elastically with a mass 3 m at rest. It moves with a velocity $v \hat{j}$ after collision, then, $v$ is given by
Select the correct option:
A
$v=\frac{1}{\sqrt{6}} u$
B
`$v=\frac{u}{\sqrt{3}}$
C
$v=\sqrt{\frac{2}{3}} u$
D
$\mathrm{v}=\frac{\mathrm{u}}{\sqrt{2}}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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