Question

A driver has a reaction time of 0.2 S. Reaction time is actually the time between actually seeing the obstacle and applying the the brakes. He is moving with an uniform speed of 30 km/h. He spots a boy crossing the road. How much distance he travels before he applying the brakes.Explain in briefly

Answer 1

Answer:

1.666m

Explanation:

Answer:

1.666m

Explanation:

speed = 30km/h = 8.33m/s

time taken = 0.2 sec

therefore, distance = speed x time

                               = 8.33 x 0.2 = 1.666m

The conversion of the units is very important.

thank you.

Answer 2

Answer:

1.66m

Explanation:

speed=30km/h

time taken=0.2 s

we need to convert 30km/h to m/s so for that we will multiply 30 by 5/18

30 x 5/18= 25/3 m/s

now we need to find the distance travelled before applying brakes

distance=speed x time

. 25/3 x 0.2= 5/3

. =1.66 m

answer-1.66 m