Question

A driver takes 0.20 s to apply brakes soon after he sees a need for it. If he is driving a car at a speed of 54

km

and the brakes cause a deceleration of 6.0 m



, then the distance travelled by the car, after he sees the

need to apply the brakes is ________.

A. 21.75 m B. 42.50 m C. 10.55 m D. 16.25 m

Answer 1

a 21.75 for 0.20 sec same velocity then use 1 and 2nd equation of motion