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Answer to Question #58849 in Mechanics | Relativity for EMEKA

Question #58849
13 A uniform plank AB 30 m long, weighing 100 N is pivoted at points P, Q which are 5 m from the ends A and B respectively. A boy of weight 250 N stands at a point D on the plank, 1 m away from Q and the arrangement is in equilibrium. Determine the reaction
R 1
R1
and
R 2
R2
at the supports.


77.5 N, 245.5 N
105.5 N 33.5 N
37.5 N, 312.5 N
27.5 N, 232.5 N
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