Question

Consider the beam shown below:


If support A sinks by an amount of $\Delta$ (downward), then reaction at support C will

• A. can increase or decrease
• B. increase
• C. remains same
• D. decrease

Answer 1

The correct option is D decrease


$\therefore R_C=R_1(\downarrow )+R_2(\uparrow )=R_2-R_1<R_2$
Hence, reaction at C decreases.