The boy sitting on the see-saw applies a moment of force on it due his own weight. To balance it, the boy of 30 kg weight will have to sit at that distance from the fulcrum which produces an equal moment of force.Therefore,Moment of force = Force Perpendicualr distanceSince, both should produce the same moment of
force40 × 1.2 = 30 × dd = 1.6
mTherefore, the other boy should sit at a distance of 1.6 m from the fulcrum of the see saw in order to balance it. (2 marks
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Answer:
The boy sitting on the see-saw applies a moment of force on it due his own weight. To balance it, the boy of 30 kg weight will have to sit at that distance from the fulcrum which produces an equal moment of force.Therefore,Moment of force = Force Perpendicualr distanceSince, both should produce the same moment of
force40 × 1.2 = 30 × dd = 1.6
mTherefore, the other boy should sit at a distance of 1.6 m from the fulcrum of the see saw in order to balance it. (2 marks
Verified answer
Write answer is 1.6..........