You will find that the sum of mg, T1 and T2 are always equal zero. Press play to find the vector of those three vectors.

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Enjoy the fun of Physics! You can access this simulation online from
static equilibrium (Sum of forces equal zero)
Designed by Fu-Kwun Hwang (http://www.phy.ntnu.edu.tw/ntnujava/)
Deptartment of Physics, National Taiwan Normal University, Taiwan