Chapter 7 - Circular Motion and Gravitation - Learning Path Questions and Exercises - Exercises - Page 261: 36

The car cannot negotiate the curve safely.

$83km/hr=23.1m/s$ $r=0.4km=400m$ Tires can support $a=1.25m/s^{2}$ But, $a_{c}=\frac{v^{2}}{r}=\frac{23.1^{2}}{400}=1.334m/s^{2}$ which is greater than what the tires can support. Hence, the car cannot negotiate the curve safely.