3. A uniform metre rule of mass 100 g is balanced at the 50 cm mark when a weight
of 50 gf is placed at the 10 cm mark and a weight W gf is placed at the 70 cm
mark.
(a) Draw a diagram in the space below to show the various forces acting on the rule.
Mark the position of the centre of gravity of the balanced rule by the letter O on it.
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Grit chambers are long narrow tanks that are designed to slow down the flow so that solids such as sand, coffee grounds, and eggshells will settle out of the water. Grit causes excessive wear and tear on pumps and other plant equipment.
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