Question

In the following diagram, pulley P1 is movable and pulley P2 is fixed. The value of angle $\theta$ will be (in degrees)

• A. $30$
  
• B. $60$
  
• C. $45$
  
• D. $90$
  

Answer 1

The correct option is A $30$

Let tension in the string be $T$.

For $P_2$

$T=W$

For $P_1$

$2Tsin\theta =W$

which gives $sin\theta =\frac{1}{2},\theta ={30}^o$