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When a driver brings a car to a stop by braking as hard as possible, the stopping distance can be regarded as the sum of a "reaction distance," which is initial speed times reaction time, and "braking distance," which is the distance covered during braking. The following table gives typical values: (a) What reaction time is the driver assumed to have? (b)What is the car's stopping distance if the initial speed is 25 m/s?

When   a driver  brings  a car  to  a stop  by  braking   as hard  as possible,   the stopping  distance  can be regarded  as the  sum  of a  "reaction   distance,"   which  is  initial   speed   times  reaction time,  and  "braking   distance,"   which  is  the  distance   covered during  braking.  The following  table  gives typical  values:
 
(a)  What  reaction   time  is  the  driver   assumed   to  have?  (b)What   is  the  car's      stopping   distance   if  the  initial   speed   is 25 m/s?

Grade:10

1 Answers

Jitender Pal
askIITians Faculty 365 Points
7 years ago
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