How does the braking system of these cars operate in comparison to a passenger automobile?

The braking system of train cars operates with a principle that is often different from that of passenger automobiles. In the context of the chosen response, the statement indicates that the braking effect increases with the greater motion of the brake handle or pedal. This is accurate because, in train operations, the brake control system is designed to provide proportional braking.

When the operator applies the brake handle or pedal with a greater degree, it sends a stronger signal to the braking system to apply more force, leading to a more significant reduction in speed or a complete stop. This proportional response allows train operators to manage braking more effectively, particularly considering the weight and momentum of the train, which differs notably from the instantaneous or less nuanced response found in most passenger vehicles.

The context of the other options provides insight into why they do not accurately describe the braking operation of train cars. For example, while the braking effect can be significant in emergencies, the system is not solely meant for such situations; it is regularly used in daily operations. The notion of a braking system that operates only in emergencies misrepresents the continuous need for speed control throughout a train's journey. The idea that braking is independent of the brake handle's motion also does not apply, as this would undermine the control capability