Question

Find analytically the support reaction at B and the load P, for the beam shown in the figure below if the reaction of support A is zero.

Answer 1

$\sum F_y=0\to R_A-10+R_B-36-P=0\to R_B=46-P$

$\sum M_A=0\to 6R_B-10\cdot2-20-36\cdot5-7P=0\to$

$6R_B-7P=220$

So, we have

$6\cdot(46-P)-7P=220\to P=56\ (kN)$ . Answer