What is Work-Energy Theorem?

Work-Energy Theorem:

• Statement: Work done by net resultant force acting on a body is equal to change in its kinetic energy.
• Mathematical Equation: W_net = ΔK = K_final - K_initial = (1/2)mv² - (1/2)mu².
• Significance: Connects force & displacement directly with speed and energy of motion in classical mechanics.