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5 September, 07:53

a large cargo trucks needs to cross a bridge the truck is 30m long, and 3.2 wide, the cargo exerts a force of 54,000 N the bridge can withstand 450 PA of pressure. is it safe for the truck to cross the bridge?

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  1. 5 September, 07:59
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    It isn't safe for the truck to cross the bridge because the pressure exerted by the truck on the bridge is greater than the maximum tolerable pressure for the bridge, 562.5 Pa > 450 Pa.

    Explanation:

    Pressure is expressed in Force/Area.

    So, for the truck, force exerted = 54000 N

    Area covered = 30 * 3.2 = 96 m²

    Pressure exerted by the truck = 54000/96 = 562.5 Pa

    The pressure exerted by the truck on the bridge is greater than the maximum tolerable pressure for the bridge, 562.5 > 450, hence, it isn't safe for the truck to cross the bridge.
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Home » Physics » a large cargo trucks needs to cross a bridge the truck is 30m long, and 3.2 wide, the cargo exerts a force of 54,000 N the bridge can withstand 450 PA of pressure. is it safe for the truck to cross the bridge?
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