when a car is cornering on a banked road, what force provides the centripetal force? in my book it says that it is the horizontal component of the normal reaction, and the vertical component of the normal balances the weight. But i thought the normal reaction was equal to the component of the weight that is perpendicular to the slope. hence the vertical component of the normal reaction could never balance the whole weight. please help if you can and also ask if i didnt explain this question well enough, thank you!