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A 4 m long rod of negligible weight is s...

A 4 m long rod of negligible weight is supported at a point 125 cm from its one end and a load of 18 kgf is suspened at a point 60 cm from the support on the shorter arm.
(a) If a weight W is placed at a distance 250 cm from the support on the longer arm to balance the rod, find W.
(b) If a weight 5 kgf is kept to balance the rod, find its position.
(c) To which class of lever does it belong ?

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