Weights Slotted serve multiple purposes in both physics and engineering labs, particularly in experiments concerning mass measurement, equilibrium principles, and instrument calibration that involve force and mass measurements, helping to understand and apply key principles like gravitational acceleration and Newton's. 

These weights aid in evaluating the mechanical properties of materials and assisting in tests such as tension, compression, and torsion. Additionally, in engineering, these weights are crucial in experiments aimed at assessing the structural integrity, stress analysis, and load-bearing capacities of different materials and components.