Salim stands on a uniform beam of mass 90 kg that is resting on two supports,…

Salim stands on a uniform beam of mass 90 kg that is resting on two supports, as shown in the diagram. He starts to walk slowly towards the right end of the beam. If Salim has a mass of 75 kg, how close will he be to the right end of the beam when its starts to tip over, in units of meters? 1.8 m 2.0 m 1.8 m