إلى طلبة وطالبات اللغات : مسائل استاتيكا حاول تحلها..!!

[tamer mansour]

AB is a wooden beam of length 20 meters and weight 50 kg.wt (acting at midpoint), If it is placed horizontally on two supports , one is 2 m distant from A and the other is 5 m distant from B. A man of weight 70 kg.wt walks on the beam starting from A towards B. Find :

i) The reaction at each of the two supports when the man is at A.

ii) The maximum distance which the man can cover before the beam is about to rotate.