Learn what power means and how we use it to describe the rate of energy transfer.

In physics, power is defined as the rate at which work is done. It measures how quickly energy is being transferred or converted. Learn how to calculate both average and instantaneous power.

Power is how fast work is done or energy is transferred—measured in watts (W), where 1 W = 1 joule per second.

Practice applying the relationship between power and the rate of energy transfer.

Explore work as a means through which energy is transferred, and apply the principle of energy conservation to analyze changes in a system's energy. Express energy concepts using multiple …

Unit 3: Work and energy About this unit For our most up-to-date, mastery-enabled courses, check out High School Physics, AP Physics 1, and AP Physics 2!

Review the key concepts and equations for power, including the difference between power and energy.

用于测量功率的标准单位是瓦，符号是 W 。该单位是以苏格兰发明家和实业家詹姆斯·瓦特的名字命名的。在日常生活中，你可能经常遇到这种情况：电灯泡或立体声等电气设备的功率输出通常以瓦特为单 …

Here, you'll learn about how it's one of the most useful concepts in physics. Along the way, we'll talk about work, kinetic energy, potential energy, and conservation of energy.

Welcome to AP®︎/College Physics 1! In AP Physics 1, you'll learn algebra-based classical mechanics. To make sure you’re prepared with the fundamentals, we recommend completing high school …