Asimple, uniform bridge has a length of 8.0 m and a mass of 15000 kg. what is the normal force of the ground on the left side of the bridge when a 1200 kg car is at a position of 6.0 m on the bridge?

76440 N.

Explanation:

Given that the length of uniform bridge is 8 m, and the mass of this bridge is 15000 kg.

And the car of mass 1200 kg is position at a distance of 6 m from the left side of the bridge.

Now according the figure W(c) force by the car, W is the force by the bridge on the center of mass, and N is the normal force on the left side of bridge.

Now the normal torque should be balance with respect to the torques on the bridge.

Now put all the given values.

Therefore,

Therefore, the normal force on the left side of the bridge is 76440 N.

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explanation:

im guessing the west of station b