By Lami’s theorem If P , Q and R the three vectors acting at a point, and their resultant is zero (i.e. the system is in equilibrium)
Then (P/sin
a) = (Q/sin
b) = (R/sin
g)
To completely straighten the rope
g = 180° and
a =
b = 90°
\ P = Q = R (sin 90°/sin 180°) = (1 x 10) x (1/0) =
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