Work, Energy & Power Explained | Chapter 6 of University Physics
Work, Energy & Power Explained | Chapter 6 of University Physics Chapter 6 bridges Newton’s laws and energy conservation by introducing work, kinetic energy, and power, along with the powerful work-energy theorem for analyzing motion and forces. Watch the full video summary on YouTube for detailed derivations and examples. Work: Definition and Calculation Work occurs when a force causes displacement. For a constant force aligned with motion, use W = F s . When force and displacement form an angle φ, apply the dot product: W = F s cos(φ) Work can be positive, negative, or zero. Forces perpendicular to motion (like the normal force on a flat surface) perform no work. To find total work, sum contributions from each force or use the net force in the dot-product formula. Kinetic Energy & the Work-Energy Theorem Kinetic energy is the energy of motion, defined by: K = ½ m v² The work-energy theorem relates net work to changes in kinetic energy: W total = ΔK = ½ m...