a meter stick of uniform mass distribution and a mass of 0.150-kg is arranged as follows; a fulcrum is placed under the stick at the 20-cm mark on the stick. A mass of 0.100-kg is suspended from the 90-cm mark. A 0.500-kg mass is suspended from the 1-cm mark. the center of mass of the meter stick is at the 50-cm mark.
At what mark on the meter stick should a mass of 0.125-kg be suspended such that the net torque on the meter stick is zero when it is completely horizontal?