13. ssm mmh A hiker, who weighs 985 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3610 N, and rests on two concrete supports, one at each end. He stops one-fifth 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?

Take torques using the center of rotation as the near end.

 

 

 

 

 

 

 

 

 

 

To find the near end use the sum of the forces in the y direction

 

 

 

 

 

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This page last updated on January 11, 2020