engineering recuitment BEL Probationary Engineers Mock Test 2025 Fluid Mechanics Dimensional and Model Analysis Dimensionless Number
Consider a system subjected to an external force F and an inertia (pseudo) force Fi. The essence of D'Alembert's principle is best captured by which of the following statements?
1
The system is in equilibrium when F = Fi
2
The system is in dynamic equilibrium when F + Fi = 0
3
The difference of the internal force and the inertia force on a system is always zero.
4
The inertia force acts to oppose the action of the external force.