9.4 Applications of Statics, Including Problem-Solving Strategies

A working routine for balanced systems: choose the pivot, draw the free-body diagram, then set both the force and torque sums to zero.

College Physics 2e, 9.4 Applications of Statics, Including Problem-Solving Strategies

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9.4 Exercise 4

A bridge is supported by two piers located 20 meters apart. Both the left and right piers provide an upward force on the bridge, labeled F_L and F_R respectively.

If a 1000 kg car comes to rest at a point 5 meters from the left pier, how much force will the bridge provide to the left and right piers?
How will F_L and F_R change as the car drives to the right side of the bridge?

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