marchellwhixky marchellwhixky

30-12-2022
Physics

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(c)The bookshelf is 100 cm long and its weight is 30 N with supports at its ends (P and Q). A book weighing 21 N is placed at 25 cm from Q. (i) Draw a sketch of the shelf, showing the supports. (ii) By using principle of moments, calculate the forces at P and Q. (1) [Total: 12]

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