Q.

In the following figure, the pulley P1 is fixed and the pulley P2 is movable. lf W1 = W2 = 100 N, what is the angle AP2P1? The pulleys are frictionless.

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a

300

b

600

c

900

d

1200

answer is D.

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Detailed Solution

2W cos θ = W2= 2 x 100 cos θ = 100⇒ cos θ = 12  ⇒ θ = 600 = 2θ = 1200
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In the following figure, the pulley P1 is fixed and the pulley P2 is movable. lf W1 = W2 = 100 N, what is the angle AP2P1? The pulleys are frictionless.