- Mass of the collar, \( m = 2 \, \text{kg} \)
- Spring constant, \( k = 3 \, \text{N/m} \)
- Unstretched length of the spring, \( L_0 = 3 \, \text{m} \)
- Distance from A to B, \( 4 \, \text{m} \)
- Initial velocity at B, \( v_B = 0 \, \text{m/s} \)
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