A particle of mass 'm' moving with velocity 'v' collides with stationary particle of mass 2m. Then the speed of the system after collision is ?
 

  • Option 1)

    2v

  • Option 2)

    v/2 

  • Option 3)

    3v 

  • Option 4)

    v/3
     

 

Answers (1)
V Vakul

As we learnt in 

Kinetic energy -

k= \frac{p^{2}}{2m}

- wherein

p\rightarrow momentum

m\rightarrow mass

kinetic Energy is frame dependent

 

 mv=(m+2m)v'

mv=3mv'

\Rightarrow v'=\frac{v}{3}

 


Option 1)

2v

Option is incorrect

Option 2)

v/2 

Option is incorrect

Option 3)

3v 

Option is incorrect

Option 4)

v/3
 

Option is correct

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