The figure below shows five identical marbles A, B, C, D and E on a groove. The

Question

The figure below shows five identical marbles A, B, C, D and E on a groove. The marbles A, B, C are moving in a group at velocity v towards the group of the marbles D and E which are at rest What will happen after the collision? A B C Select one: a. Marbles A, B stop whereas marbles C, D, E move in a group at speed v O b. Marbles A stop whereas marbles B, C, D, E move in a group at speed v. O c. All five marbles A, B, C D and E move in a group at speed v. d. Marbles A, B, C stop whereas marbles D, E move in a group at speed v.

Explanation / Answer

let mass of each marble is m.

total momentum before collision=3*m*v

as momentum is conserved, momentum after collision has to be 3*m*v.

among the options listed, only the first option i.e. option a describes a scenario where momentum after collision is 3*m*v

hence option a is the correct solution.

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