b Figure 4b shows a rectangular steel block of height 7.0 cm, width 5.0 cm, and thickness 3.0 cm, hanging from the point A on a beam. The beam is pivoted at the point P, and has mass 2.0 kg acting through its midpoint. The beam is held horizontal by the counterweights suspended from C. The length CP is 10 cm, and the length AP is 36 cm. 10 cm 13 cm 23 cm P A O Beam weight of beam 7.0 cm 5.0 cm _ * 3.0 cm Figure 4b