# 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

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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