[填空题]
(II) A sports car of mass 950 kg (including the driver) crosses the *l,y*drj-yudy* b ar- wg du2( k/ih8vroundrd*.bm )w c*mhx,tja cn)8h*hed top of a hill (rahc h* bndxwja)c,).ht8r*mm *dius =95$ \mathrm{~m}$ ) at 22 $\mathrm{~m} / \mathrm{s}$ . Determine
(a) the normal force exerted by the road on the car,
(b) the normal force exerted by the car on the 72-kg driver
(c) the car speed at which the normal force on the driver equals zero.
