Question

which of the listed components provides the most resistance to wheel rotation on a hybrid during normal braking?
a) front brakes
b) rear brakes
c) friction brakes
d) traction motor

Explanation:

During normal braking in a hybrid vehicle, the traction motor plays a significant role. In regenerative braking (a common feature in hybrids), the traction motor acts as a generator. It converts the kinetic energy of the vehicle into electrical energy (which is then stored, for example, in a battery). This conversion process creates resistance to the wheel rotation. Front and rear brakes (options A and B) are traditional friction - based brakes. While they do provide resistance, in a hybrid during normal braking (where regenerative braking is utilized), the traction motor's contribution to resistance is more prominent. Friction brakes (option C) are part of the traditional braking system and are not the main source of resistance during normal braking in a hybrid (where regenerative braking via the traction motor is a key feature).

Answer:

D. Traction motor