Science

Levers

In this Class 9 Science topic from “Work, Energy, and Simple Machines,” students learn how a lever is a rigid bar that turns around a fixed point called the fulcrum. They explore the roles of load and effort, identify first-, second-, and third-class levers, and understand how the positions of these points affect motion and force. The topic also introduces mechanical advantage and explains everyday examples such as scissors, a wheelbarrow, tweezers, and a seesaw.