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I here is a parabolic shaped bridge acr...

I here is a parabolic shaped bridge across the river of width 10 meter.The highest point of the bridge is 4 meter above the level of bank.A car of mass 72kg is crossing the bridge at a constant speed of 5m/s . Find the force (in Newton) exerted on the bridge by car when it is at the highest point P of the bridge.`(take g=10m/s^(2))`

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