A uniform metre rule of mass 90g is provided at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark, determine M by Sunday | May 23 | Physics WAEC | 0 comments A. 72g B. 102g C. 298g D. 504g Correct Answer: Option B B. 102g Users Also Read These:An object is placed 20cm from a concave mirror of…A uniform metre rule is balanced on a fulcrum placed…A uniform solid cube material 10cm on each side of…In the diagram above, AB represents a uniform rod of…By what factor will the size of an object placed…