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Constraint (mechanics)
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<h2 id="types-of-constraint">Types of constraint</h2> <ul><li><a href="/facts/First_class_constraint/P7f7bg4I">First class constraints</a> and <a href="/facts/Second_class_constraints/P7f7bg4I">second class constraints</a></li> <li><a href="/facts/Primary_constraint/lwvBIQYg">Primary constraints</a>, <a href="/facts/Secondary_constraint/lwvBIQYg">secondary constraints</a>, <a href="/facts/Tertiary_constraint/lwvBIQYg">tertiary constraints</a>, quaternary constraints</li> <li><a href="/facts/Holonomic_constraints/cvxCH0Ar">Holonomic constraints</a>, also called integrable constraints, (depending on time and the coordinates but not on the momenta) and <a href="/facts/Nonholonomic_system/5VHl7nMU">Nonholonomic system</a></li> <li><a href="/facts/Pfaffian_constraint/xkosnccs">Pfaffian constraints</a></li> <li><a href="/facts/Scleronomic_constraint/lQlh09WQ">Scleronomic constraints</a> (not depending on time) and <a href="/facts/Rheonomic_constraint/bAzB95u3">rheonomic constraints</a> (depending on time)</li> <li>Ideal constraints: those for which the work done by the constraint forces under a <a href="/facts/Virtual_displacement/UclFscS1">virtual displacement</a> vanishes.</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Leach, Dr Andrew (2001-01-30). Molecular Modelling: Principles and Applications (2nd ed.). Harlow: Prentice Hall. pp. 369–370. ISBN 9780582382107. <a href="9780582382107" target="_blank">9780582382107</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>