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Two ball bearing mass 5 \mathrm{~kg} each is moving in opposite directions with equal speed 5 \mathrm{~m} / \mathrm{s}. collins head on with each other. The final velocities of the ball if collisions is elastic -
 

Option: 1

4 \mathrm{~m} / \mathrm{s},3 \mathrm{~m} / \mathrm{s},
 


Option: 2

5 \mathrm{~m} / \mathrm{s},-5 \mathrm{~m} / \mathrm{s}
 


Option: 3

3 \mathrm{~m} / \mathrm{s},-3 \mathrm{~m} / \mathrm{s}
 


Option: 4

5 \mathrm{~m} / \mathrm{s}, -4 \mathrm{~m} / \mathrm{s}


Answers (1)

best_answer

Here, \mathrm{m_1=m_2=5 \mathrm{~kg}.}

         \mathrm{ v_1=5 \mathrm{~m} / \mathrm{s} . v_2=-5 \mathrm{~m} / \mathrm{s} \text {. } }

In such type of conditions Velocity get interchange so -

\mathrm{ v_2=v_1=5 \mathrm{~m} / \mathrm{s} .}

\mathrm{ v_1=v_2=-5 \mathrm{~m} / \mathrm{s} .}

Hence 2 is correct.



 

Posted by

Riya

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