Questions
In the following diagram, pulley P1 is movable and pulley P2 is fixed. The value of angle will be
a
60o
b
30o
c
45o
d
15o
detailed solution
Correct option is B
From free body diagram of pulley P1At the pulley is in equilibrium, considering horizontal direction For horizontal equilibrium,T1cosθ=T2cosθ⇒ T1=T2 and T1=T2=W .......(i)Now considering for vertical equilibriumT1sinθ+T2sinθ=W ....(ii)From (i) & (ii), we getWsinθ+Wsinθ=W∴ sinθ=12 or θ=30∘Talk to our academic expert!
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