Answhen three coplanar, concurrent and noncolinear forces act on a body which is in equilibrium then the magnitude of each force is proportional to the sine of angle between other two forces. Mathematically where p, q and r are the three forces and. Lamis theorem states that if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two forces. It states that if three coplanar forces acting at a point be in equilibrium, then each force is proportional to the sine or the angle between the other two lames theorem pdf download. Solved example problems on application of lamis theorem.

Calculate the tension in both the strings in this case. Problem 3 on lami s theorem video lecture from chapter equilibrium of forces in engineering mechanics for first year engineering students. Lami s theorem experiment pdf downloadgolkes download. Lami s theorem is only applied for three coplanar concurrent forces, which are in. Hindi vectors for iit jee by udit gupta unacademy plus. Watch previous videos of chapter equilibrium of forces. A baby is playing in a swing which is hanging with the help of two identical chains is at rest. Apply lami s theorem and find out the tension acting on the chain. Solved example problems on application of lami s theorem.

Typical examples of equilibrium analysis and a brief introduction of lami s theorem hindi vectors for iit jee. Verify the triangle law of forces and lamis theorem. In statics, lamis theorem is an equation that relates the magnitudes of three coplanar, concurrent and noncollinear forces, that keeps a body in static equilibrium. Consider an advertisement board hangs with the help of two strings making an equal angle with the ceiling. Lami s theorem states that if three coplaner forces acting at a point be in equilibrium, then each force is proportional to the sine of the angle between the other two forces. The free body diagram of the same helps us to resolve the forces first.

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