(Solved): Banked Frictionless Curve, and Flat Curve with Friction A car of mass M=1300kg traveling at 40 ...

$$\pm$$ Banked Frictionless Curve, and Flat Curve with Friction A car of mass $$M=1300\mathrm{kg}$$ traveling at $$40.0$$ $$\mathrm{km}$$ /hour enters a banked turn covered with ice. The road is banked at an angle $$?$$, and there is no friction between the road and the car's tires as shown in ( Figure 1). Use $$g=9.80\mathrm{m}/{\mathrm{s}}^2$$ throughout this problem. What is the radius $$r$$ of the turn if $$?=20.0^{?}$$ (assuming the car continues in uniform circular motion around the tum)? Express your answer in meters.