Question

D'alembert's principal is used for​

Answer 1

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➨ It is also known as the Lagrange-d’Alembert principle, named after the French mathematician and physicist Jean le Rond d’Alembert. It is an alternative form of Newton’s second law of motion. According to the 2nd law of motion, F = ma while it is represented as F – ma = 0 in D’Alembert’s law. So it can be said that the object is in equilibrium when a real force is acting on it. Here, F is the real force while -ma is the fictitious force known as inertial force.

➨D’Alembert’s principle is used for analyzing the dynamic problem which can reduce it into a static equilibrium problem.