2. What is the SI unit of energy?

The SI unit of energy is the joule (J). This unit is named after the British physicist James Prescott Joule, who contributed significantly to the study of energy and thermodynamics. One joule is defined as the energy transferred when a force of one newton is applied over a distance of one meter. So, next time you take a stroll and push something, remember you’re giving it joules! Energy isn’t just confined to textbooks—it’s all around us! Whether you’re charging your phone, brewing coffee, or running a marathon, energy is at play. Knowing how to measure energy in joules helps in understanding power consumption in devices and energy efficiency in homes, making it easier to save on those pesky utility bills while reducing your carbon footprint.