$(14)$ A $1000-kg$ car is slowly picking up speed as it goes around a horizontal curve whose radius is $100$ m $.$ The coefficient of static friction between the tires and the road is $0\mathrm{.}350.$ At what speed $($in unit of $\frac{m}{s})$ will the car begin to skid sideways?

A$.9\mathrm{.}25$

B$.23\mathrm{.}6$

C$.34\mathrm{.}3$

D$.35\mathrm{.}0$

E$.18\mathrm{.}5$

$(15)$ A car is moving through three sections of a road with the same speed, as shown in the figure below. At which point$($s$)$ does the car experience the smallest normal force from the ground?

A$.$ A

B$.$ B

C$.$ C

D$.$ Both A and C

E$.$ Both B and C

$(15)$ A car is moving through three sections of a road with the same speed, as shown in the figure below. At which point$($s$)$ does the car experience the smallest normal force from the ground?

A$.$ A

B$.$ B

C$.$ C

D$.$ Both A and C

E$.$ Both B and C