the fundamental law that defines how a lever operates, determining the relationship between force, effort, and distance

उस्तरे का सिद्धांत

English Usage: The principle of the lever plays a crucial role in mechanical engineering.

Hindi Usage: उस्तरे के सिद्धांत का यांत्रिक अभियांत्रिकी में महत्वपूर्ण भूमिका है।