[单选题]
A car goes around a flat curve of radiusw45bn :xq-wf-bm vgm/wgky768 otxs 1d x:m ;k 50 m0kgv-+.pxz qtg(y cq 0;aif l- at a speed of 14 m/s. What must be the minimum coefficient of friction between the tires and the road f l(p-t; c.qqz-0a fikgx gy0+vor the car to make the turn?
