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(B) In a one-dimensional elastic collision between identical particles,if the number of particles moving with velocity $v$ collide with an equal numbe

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Two balls from the right roll out with speed $v$ each and the remaining balls will remain stationary.

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(B) In a one-dimensional elastic collision between identical particles,if the number of particles moving with velocity $v$ collide with an equal number of stationary particles,the moving particles come to rest and the stationary particles start moving with the same velocity $v$.Here,$2$ balls are moving with velocity $v$ and they collide with a row of $6$ stationary balls.Due to the conservation of linear momentum and kinetic energy in an elastic collision between identical masses,the $2$ incident balls will come to rest,and $2$ balls from the right end of the row will move out with the same velocity $v$.The remaining $4$ balls in the row will remain stationary.

Six identical balls are lined in a straight groove made on a horizontal frictionless surface as shown. Two similar balls each moving with a velocity $v$ collide elastically with the row of $6$ balls from the left. What will happen?

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