Question

In the image below, a free-body diagram represents the forces of several vehicles driving across a bridge. Assume that the bridge is in statio equilibrium and that it has zero weight, and solve for the unknown reaction force
A. 10,800 N
B. 65,200 N
C. 120,200 N
D. 53,400 N​

Answer 1

Answer:

The answer is "57,400 N".

Explanation:

$\Sigma F_y=0 \ \ \ \ \ \ \text{static equilibrium}\\\\\to 121,200+R=17800+150,000+10800\\\\R=57,400\ N$

The answer is 57,400 N because the choices are wrong.