A lever is a rigid bar that pivots around a fixed point called a fulcrum. It helps in lifting or moving objects. A seesaw is an example where force at one end moves the other.
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A lever is a simple machine consisting of a rigid bar that rotates around a fixed point called the fulcrum. It helps reduce effort by distributing force. Depending on the position of effort, load, and fulcrum, levers are classified into first-class (seesaw), second-class (wheelbarrow), and third-class (tongs). In a seesaw, when a person pushes down on one end, the opposite side rises due to the applied force, demonstrating how levers make work easier.