This introduction covers It's Not Just How Much Energy — It's How Fast within Power for GCSE Physics. Revise Power in Energy for GCSE Physics with 14 exam-style questions and 25 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 1 of 12 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 1 of 12
Practice
14 questions
Recall
25 flashcards
⚡ It's Not Just How Much Energy — It's How Fast
A Ferrari and an electric milk float could both drive up the same hill, transferring the same total gravitational potential energy to get to the top. But the Ferrari does it in 10 seconds; the milk float takes 10 minutes. The difference is not the amount of energy — it is the rate at which energy is transferred. This is power. A 100 W light bulb transfers 100 joules every second. A 3,000 W kettle transfers 3,000 joules every second — 30 times faster. That is why your kettle boils water in 2 minutes while a faint torch bulb could never boil a cup of water at all, even if left running all day.