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A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of mass 15 kg is hing at the end.

A- where would you place another bag of sand, of mass 10 kg, to balance this plank? 1.25meters!

B- when the plank is balanced, where is the center of gravity of the system located?

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