Concept Simulation $9\mathrm{.}1$ illustrates how the forces can vary in problems of this type. A hiker, who weighs $790$ N $,$ is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs $4560$ N $,$ and rests on two concrete supports, one on each end. He stops $\backslash (1/3\backslash )$ of the way along the bridge. What is the magnitude of the force that a concrete support exerts on the bridge $($a$)$ at the near end and $($b$)$ at the far end?

$($a$)$ Number

Units

$($b$)$ Number

Units