Question

a driver takes 0.20 seconds to apply the brakes. if he is driving a car at a speed of 54 kmh . and the brakes cause a deceleration of 6.0 ms . find the distance traveled by the car after he sees the need to put the brakes

Answer 1

t=0.20 s
u=54kmph or 15mps
a= -6mps
so, wkt

s=ut+1/2at^2
putting the value

s=15(.2)+1/2(-6)(.04)
s=3-1.2
s=1.8m

Answer 2

Answer:

Explanation:

s = ut + 1/2 at ^2

S Distance (x)

U Initial velocity (54 km/h)

T Time (0.20 s)

A Acceleration (-6 )

=> x = (54 * 0.20) + 1/2 * -6 * (0.20 * 0.20)

= 10.8 + 1/2 * -24

= 10.8 + (-12)

= 1.2 M