A plank AB 3.0m long weighing 20kg and with its centre of gravity 2.0m from...

A plank AB 3.0m long weighing 20kg and with its centre of gravity 2.0m from the end A carries a load of mass 10kg at the end A. It rests on two supporters at C and D.
(i). Compute the values of the reaction forces R1 and R2 at C and D.
(ii). How far from D, and on which side of it,must a mass of 24kg be placed on the plank so as to make the reactions equal? What are the values?
(iii). Without this 24kg , what vertical force applied at B will just lift the plank clear off D? What is then the reaction at C?

In Physics
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Asked by Christianah on 2nd November, 2024