In this case work done by force is always 0 and constraint is workless and remark as ideal. Usually the force of constraints act perpendicular to the surface and momentum of the particle parallel to the surface of constraints. In case of rigid body the action and reaction between any two particles (i.e. These forces associated with the constraints are called as forces of constants.Į.g., In case of simple pendulum, constraint force is the tension of string. Ĭonstraints are always related to a force that restrict the motion of the particle.
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