Answer:
1. I would like to change the time of distraction. Because 8 s is a long time to be distracted while driving on the road. Its not safe for the driver and the other people on road if the driver is distracted even for a second.
2. sā = 80 m
3. sā = 5 m
4. t = 1.25 s
5. sā = 7.5 m
6. s = 92.5 m Ā Ā
Explanation:
1.
I would like to change the time of distraction. Because 8 s is a long time to be distracted while driving on the road. Its not safe for the driver and the other people on road if the driver is distracted even for a second.
2.
Distance Covered While Distracted = sā = (speed of car)(distraction time)
sā = (10 m/s)(8 s)
sā = 80 m
3.
Distance Covered While Reacting = sā = (speed of car)(reaction time)
sā = (10 m/s)(0.5 s)
sā = 5 m
4.
Using 1st equation of motion braking motion:
Vf = Vi + at
where,
Vf = Final Speed = 0 m/s
Vi = Initial Speed = 10 m/s
a = acceleration = - 8m/sĀ²
t = ?
Therefore,
0 m/s = 10 m/s + (-8m/sĀ²)t
t = (10 m/s)/(8 m/sĀ²)
t = 1.25 s
5.
Now, using second equation of motion:
Distance Covered While Braking = sā = Vi t + (1/2)atĀ²
sā = (10 m/s)(1.25 s) + (1/2)(-8m/sĀ²)(1.25 s)Ā²
sā = 12.5 m - 5 m
sā = 7.5 m
6.
Total Distance = s = sā + sā + sā
s = 80 m + 5m + 7.5 m
s = 92.5 m
