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A modern gran -prix racing car of masses...

A modern gran -prix racing car of masses m is travelling on a flat track in a circular arc of radius R with a speed `v`. If the coefficient of static friction between the tyres and the track is `mu_(s)`, then the magnitude of negative lift `F_(L)` acting downwards on the car is `:` ( Assume forces on the four tyres are identical and g = acceleration due to gravity )

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