A-LevelMathematicsMechanicsMay/June 2017Paper 5 Q57 Marks
A uniform semicircular lamina of radius 0.7 m and weight 14 N has diameter AB. The lamina is in a vertical plane with A freely pivoted at a fixed point. The straight edge AB rests against a small smooth peg P above the level of A. The angle between AB and the horizontal is 30° and AP = 0.9 m (see diagram).
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