A modern grand – prix racing car of mass \( m \) is travelling on a flat track in a circular act 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)
