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5.work,energy,power and collision — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics5.work,energy,power and collision1 Mark
MCQ
Particle $A$ makes a perfectly elastic collision with another particle $B$ at rest. They fly apart in opposite direction with equal speeds. If their masses are $m_A$ and $m_B$ respectively, then
  • A
    $2 m_A=m_B$
  • B
    $\sqrt{3} m_A=m_B$
  • C
    $4 m_A=m_B$
  • ✓
    $3 m_A=m_B$
✓

Answer

Correct option: D.
$3 m_A=m_B$
d
(d)

From conservation of momentum and mechanical energy conservation

$3 m_A=m_B$

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