Power

• What is power defined as in physics?


  Power is the rate at which energy is transferred or work is done.
• How is work defined in the context of energy transfer?


  Work is a transfer of energy by a force.
• What is an example of work being done?


  A box being moved across a surface by a hand.
• What determines how long a process takes in terms of power?


  The amount of power provided determines how long a process takes.
• How does a more powerful process compare to a less powerful one?


  A more powerful process takes less time to complete than a less powerful one.
• What does a bigger flame indicate when boiling water?


  A bigger flame indicates a more powerful process as the water boils in less time.
• How can the power of weightlifters be compared?


  The weightlifter with more powerful muscles can lift weights in less time.
• What is electrical power?


  Electrical power refers to the rate at which electrical energy should be transferred to components.
• Where can power ratings for electrical components typically be found?


  Power ratings are usually found on a sticker on the back or bottom of a component.
• What happens if the power supplied to an electrical component is too low?


  If the power is too low, the component won't work.
• What could happen if the power supplied to an electrical component is too high?


  If the power is too high, it could be dangerous.
• What does the power of an engine determine?


  The power of a motor determines how quickly an object accelerates and gains kinetic energy.
• What is an example of a low power engine?


  A mobility scooter is an example of a low power engine.
• What is an example of a high power engine?


  A train is an example of a high power engine.
• Why do motors need to be powerful at times?


  Motors need to be powerful to oppose strong resistive forces.
• What is a situation where a train's motor needs to be powerful?


  A train needs to be powerful to climb a hill.
• What are the key features of the Launchpad learning platform for GCSE revision?


  • Covers the whole specification
  • Interactive quizzes
  • Easy to follow videos
  • AI tutor support
  • Designed to motivate students
• What is the purpose of the power ratings on electrical components?


  • Indicate recommended power transfer rate
  • Ensure safe operation of the component
  • Prevent damage from incorrect power supply