A uniform plank AB is 10m long and has mass of 14km. The plank rest on two support at A and B. A lead of mass 8kg is placed on the plank at a point c 4meter away from A. Calculate the reactions at the support at A and B on the plank

Answer 1

I'm sure this question is related with moment of force about the supports but still even I'm confused how to solve..need help with this..!!