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Physics - Energy, Work and Power (Form II)
Muhtasari / Summary: Work, KE, PE, conservation of energy, and power.
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Work is done when a force moves an object in the direction of the force: W = F × d (Joules). Energy is the ability to do work. Kinetic Energy KE = ½mv². Potential Energy PE = mgh. Law of Conservation of Energy: energy cannot be created or destroyed, only converted. Power is the rate of doing work: P = W/t (Watts). Efficiency = (useful output energy ÷ total input energy) × 100%.