Peoples Empowerment Group
ISBM COLLEGE OF ENGINEERING, NANDE, PUNE
DEPARTMENT OF APPLIED SCIENCE
Academic Year 2019-20-21
ENGINEERING MECHANICS
Experiment no.4
Title: To study the equilibrium of particle subjected to non-coplanar
concurrent forces.
Aim: To study the equilibrium of particle subjected to non-coplanar concurrent forces.
Apparatus: A space frame, spring balance weight, scale and thread.
Description of apparatus : The experimental setup consist of space frame in fig. is a rigid
jointed space frame as shown in fig 1 .Three balance carrying a thread at one end,can be hooked
on to any of the holes. At the end of the three string make a knot at P from which a load W can
be hung.
Theory: The forces acting at point P are shown in fig. 2,these forces are vertically represented
as T1=T1e1, T2=T2e2, T3=T3e3 ,W = WK where T1, T2, T3 are magnitude of tensions ,e1, e2 ,and e3
are unit vector along respective of P direction for equilibrium of point P.
T1+T2+T3 +W =0
Unit vectors e1, e2 and e3 can be derived by knowing the position co-ordinates of points 1, 2, 3
and P and tension T1, T2, T3 can be obtained analytically by solving vector equation through
equivalence of i, j and k coefficients.
Procedure:
1) The three string carrying the spring balance are hooked on three space frame 1, 2 and 3
are ends to form a knot at point P carrying a hook.
2) The initial readings on balance are noted.
