Question

why do the brakes of a car often smell hot after the car has gone down a very steep hill

Answer 1

when a car goes down a very steep hill,he driver has to apply the brakes often.
the frictional force results in heat and it is conducted t the brakes, THUS THE BRAKES SMEEL HOT AFTER A STEEP HILL RIDE

Answer 2

A steep hill makes a car go directly town due to gravitational pressure and to stop the car the driver needs to use the break again and again resulting , the breaks smell hot.