Work (physics)
Related papers: 20
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Work, in the physics sense, is the transfer of energy that occurs when a force is applied to an object over a displacement in the direction of that force, quantified as the dot product of force and displacement vectors. In robotics and AI, this principle is foundational to understanding how actuators, motors, and mechanisms expend energy to move joints, lift payloads, or propel a robot through its environment. Engineers use work calculations to evaluate actuator efficiency, design legged locomotion systems, optimize exoskeletons that reduce metabolic cost during walking, and size motors for manipulators and prosthetic limbs. It also informs the analysis of compliant and variable-stiffness actuators, where elastic energy storage and release must be carefully balanced against mechanical work output. Understanding work is critical for energy budgeting in autonomous systems, where battery capacity is finite and operational endurance depends directly on minimizing unnecessary energy expenditure. By accurately modeling the work performed across every degree of freedom, designers can build robots that are faster, safer, and more efficient in real-world tasks.
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