37.圖(十)樑的EI為定值,C點受到外力P作用後之垂直變位為下列何者?(A) PL^3/2EI(B) PL^3/EI(C) 3PL^3/2EI(D) 2PL^3/EI

39. 圖(十二)中a、b、c桿件之材料彈性模數(Elastic Modulus)為E、斷面積為A, a、c 桿件長度為b桿件的二倍,則a、b、c三根桿件所受到的拉力分別為:(A) a 桿拉力=P、b 桿拉力=P、c 桿拉力=P(B) a 桿拉力=\(\frac{P}{3}\)、b 桿拉力=\(\frac{P}{3}\)、c 桿拉力=\(\frac{P}{3}\)(C) a 桿拉力=\(\frac{P}{4}\)、b 桿拉力=\(\frac{P}{2}\)、c 桿拉力=\(\frac{P}{4}\)(D) a 桿拉力=\(\frac{2P}{5}\)、b 桿拉力=\(\frac{P}{5}\)、c 桿拉力=\(\frac{2P}{5}\)