Question

Three ideal strings are tied together in a knot with masses attached to the other end of each of the strings. Two of the strings pass over ideal pulleys.The knot

is in equilibrium. String 1 has a mass of 125 g attached and makes an angle of 36.0°counterclockwise from the positive x-axis. String 3 has a mass of 225 g and hangs straight down at an angle of 270°counterclockwise from the positive x-axis. What is the mass hanging on string 2?

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