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:
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