Answer:
SSD = 565.54 ft
Explanation:
Given data:
driver speed = 60 mph
clear distance available to stop the truck on emergency can be calculated by using stopping sight distance
SSD = Lag distance + breaking distance
let take comfortable acceleration rate as a = 11.2 ft/s^2
g =32.2 ft/s^2
a = fg
speed is given as 60 mph
we know that 1 mile 5290 ft
i hr = 3600 sec
therefore v = 88 ft./s
from standard assumption time to reaction is taken as 2.5 sec
so
SSD = 565.54 ft
Answer:
Car drivers and front seat passengers must wear a seat belt, unless they have a medical exemption certificate. Adults travelling in the rear of a car must also use seatbelts, if they're fitted. It's the responsibility of the adult passenger (not the driver) to make sure that they are using the seatbelt.
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