2. Dos esferas de iguales masas chocan. Si una de ellas está en reposo y la otra posee una velocidad de 8 m/s antes del choque, calcular las velocidades que tendrán después del choque si este es perfectamente elástico.

When two objects with equal masses collide elastically, both momentum and kinetic energy are conserved. Object B's velocity after the collision will be 4 m/s to the right.

Explanation:

When two objects with equal masses collide elastically, both momentum and kinetic energy are conserved.

Using the conservation of momentum:
Before collision: momentum = 0 (object A at rest, object B moving). After collision: object A moves left, object B moves right. So, the velocity of object B after the collision will be 4 m/s to the right.

Using the conservation of kinetic energy:
Initially: KE = 0. After collision: object A's KE = 32 J, object B's KE = 32 J. Thus, object B's velocity is 4 m/s to the right.

Learn more about Elastic Collisions of Objects here:

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