Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. A 0.5-kg ball A is released from rest when the cord attached to it is horizontally placed. When ball A reaches its lowest point, it collides with the stationary ball B (0.4 kg). Right after the collision, ball B gained a velocity of vB3 = 4.65 m/s as shown. Then, ball B falls until it hits the wall that is located at a horizontal distance of 1.5 m. Determine the length L of the cord. Also, find the velocity of ball B, vB5, just after it hits the wall. The coefficient of restitution for all the collisions is e = 0.8.

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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.