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There is a parabolic shaped bridge acro...

There 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 72 kg is crossing the bridge at a constant speed of 5 m/s. Find the force (in Newton) exerted on the bridge by car when it is at the highest point 'P' of the bridge. (take m/s) g=10 m

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