Six identical balls are lined up in a straigh | vedclass

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Question

(B) In a one-dimensional elastic collision between identical masses,the colliding body comes to rest and transfers its velocity to the stationary body

Vedclass · Accepted Answer

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 masses,the colliding body comes to rest and transfers its velocity to the stationary body if the number of incoming bodies equals the number of outgoing bodies.Here,$2$ balls are moving with velocity $v$ and collide with a row of $6$ identical stationary balls.By the principle of conservation of linear momentum and kinetic energy for elastic collisions of identical masses,the $2$ incoming balls will come to rest,and $2$ balls from the right end of the row will move out with the same velocity $v$.Therefore,the correct option is $B$.

Six identical balls are lined up in a straight groove on a horizontal frictionless surface. 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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