In an emergency situation while driving one has tendency to jam the brakes, trying to stop in shortest distance. With wh

[answerhappygod]

In an emergency situation while driving one has tendency to jam
the brakes, trying to stop in shortest distance. With wheels
locked, the car slides and steering get useless. In ABS system the
electronic sensors keep varying the brake pressure so as to keep
the wheels rolling (without slipping) while ensuring that the
friction remains limiting. Your friend has an old car with good
brakes. He boasts saying that all the four wheels of his car get
firmly locked and stop rotation immediately after the brakes are
applied. You know that your new car which has a computerized anti
lock braking system (ABS) is much safer. How will you convince
your friend? In a typical situation, car without ABS needs 20 m as
minimum stopping distance. Under identical conditions, what minimum
distance a car with ABS would need to stop? Coefficient of kinetic
friction between tyre and road is 25% less than the coefficient of
static friction.