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# For quicker problem solving in mechanics one should know 1st year engineering level concepts like DAlemberts principle,Work Energy principle,virtual work priniple, concept of centreof mass etc.Plz suggest some books which have this approach.Also suggest some 1st year engineering mechanics books which can be solved by a +2 student.

Arun
25763 Points
10 months ago
D'Alembert's principle. ... The second law states that the force F acting on a body is equal to the product of the mass m and acceleration a of the body, or F = ma; in d'Alembert's form, the force F plus the negative of the mass m times acceleration a of the body is equal to zero: F - ma = 0.
Arun
25763 Points
10 months ago
The work-energy principle states that an increase in the kinetic energy of a rigid body is caused by an equal amount of positive work done on the body by the resultant force acting on that body. Conversely, a decrease in kinetic energy is caused by an equal amount of negative work done by the resultant force.
Derivations from other quantities: W = F ⋅ s; W = τ θ
Arun
25763 Points
10 months ago
Virtual work arises in the application of the principle of least action to the study of forces and movement of a mechanical system. The work of a force acting on a particle as it moves along a displacement is different for different displacements.
Arun
25763 Points
10 months ago
The center of mass is a position defined relative to an object or system of objects. It is the average position of all the parts of the system, weighted according to their masses. For simple rigid objects with uniform density, the center of mass is located at the centroid.
Vikas TU
14149 Points
9 months ago
Dera student