Question

A frame ABCD is supported by a roller at A and on a hinge at C as shown below:


The reaction at the roller end A is given by

• A. P
• B. 2P
• C. P/2
• D. Zero

Answer 1

The correct option is D Zero


Taking moment about hinge at C:

$R_A$ x L + P x $\frac{L}{2}$ - P x $\frac{L}{2}$ = 0

$R_A\times L=0$

$\Rightarrow$ $R_A=0$

Hence, reaction at A is zero.