A modern grand-prix racing car of mass $$m$$ 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:

A

$$m\left(\frac{v^2}{\mu_s R} + g\right)$$

B

$$m\left(\frac{v^2}{\mu_s R} - g\right)$$

C

$$m\left(g - \frac{v^2}{\mu_s R}\right)$$

D

$$-m\left(g + \frac{v^2}{\mu_s R}\right)$$