Circular Motion: Car Over Bridge MCQ

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Car Over BridgeHardQuestion 30642

Question

A car (mass 1200 kg) travels at 20 m/s over a bridge (radius 50 m). Normal force on car at the top of the bridge: (g = 10)

2400 N

mg − N = mv²/r → N = m(g − v²/r) = 1200(10 − 400/50) = 1200(10−8) = 2400 N.