Automobiles have anti-lock braking systems to prevent the wheels from locking when the brake is suddenly applied. Rather than applying a constant force on the wheel, an anti-lock braking system exerts a series of forces of short duration on the wheel. Why would this be true?

a) The kinetic friction force is larger than the static friction force

b) When the tire is locked, the frictional force is greater but the car cannot be steered

c) The static friction force is larger than the kinetic friction force

d) The coefficient of kinetic friction of the road in motion with respect the skidding tire is larger than the static coefficient of the road

Respuesta :

Anti-lock braking system (ABS) is a system that assists the car to come to a

stop when the road is slippery, and an emergency stop is required, such

that the driver is still able to steer the car in the situation

The correct option that gives the reason why it is true that ABS exerts a

series of forces of short duration on the wheel is option c)

  • c) Static friction force is larger than kinetic friction

The reasons why option c is correct is given as follows:

In an emergency, when the car must be suddenly stopped, to prevent a

collision, as he or she is panicked, the driver usually presses hard on the

brake, such that the tire can be locked and held firmly in place.

The  condition of the wheel being stopped from rotating while the car is

moving  in order to bring the car to a quick stop, causes traction to be lost,

because, the static frictional force of the brakes is larger than kinetic

friction force of the road, therefore, the excess force causes the vehicle to

lose traction.

An ABS operates by delivering several short duration stopping force on the

wheel, allowing the wheel to interact and gain traction with the road at

intervals during an emergency stop, allowing the driver to steer and

control the vehicle.

Therefore, rather than applying a constant force (of static friction) on the

wheel a series of short duration forces are exerted that intermittently

reduces speed, thereby providing opportunities for traction to be regained

through interaction between the tire and the road (kinetic friction) from

which the interventions of the driver including steering and braking can be

made effective due to the reintroduction of the required tire rotational

speed relative road surface at which braking and steering can occur as the

tire begins to roll again after being allowed to do so by the ABS allowing

the driver to steer and stop the car, because static friction force is larger

than kinetic friction force.

Learn more about anti-lock braking systems here:

https://brainly.com/question/13559902