Two spheres of different masses and initial velocities collide with each other on frictionless surface, as shown in Figure 5. Assume the collision is direct central and the coefficient of restitution e = 0.8, determine their velocities after the collision.

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.