Power in Physics: The Speed of Doing Work

  1. Power Defined – In physics, power is how quickly work is done or energy is transferred.
  2. Formula for Power – Power equals work divided by time: 𝑃=π‘Š/𝑑.
  3. Watts Measure It – Power is measured in watts, with one watt equal to one joule of work per second.
  4. Everyday Example – A fast sprinter uses more power than a slow jogger, even if both cover the same distance.
  5. Engines at Work – A powerful car engine does the same work faster, delivering more acceleration.
  6. Lightbulb Lesson – A 100-watt bulb uses energy twice as quickly as a 50-watt bulb.
  7. Human Muscles – Lifting weights quickly requires more power than lifting them slowly.
  8. Efficiency Factor – Machines that waste less energy as heat can deliver more useful power.
  9. Big Picture – Power shows not just the amount of energy used, but the rate of energy flow.
  10. From Homes to Space – Whether it’s charging your phone or launching rockets, power drives every modern system.