急 工程力学的题目求FA  FB

对A点取矩,合力矩为零：FB*2 = Me + 0.5*q*1^2 = 4+2 = 6 kNm,所以FB = 3 kN;
竖直方向合力为零：FA + FB = q*1 = 4,所以 FA= 1 kN;