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Grade: 12
A car can be braked to a stop from the autobahn-like speed of 217 km/h in 170 m. Assuming the acceleration is constant, find its magnitude in (a) SI units and (b) in terms of g(c) How much time Tb is required for the braking? Your reaction time Tr is the time you require to perceive an emergency, move your foot to the brake, and begin the braking. If Tr = 400 ms, then (d) what is the ratio Tb/Tr?
Dark sunglasses delay the visual signals sent from the eyes to the visual cortex in the brain, increasing Tr(e) In the extreme case in which Tr is increased by 100 ms, how much farther along the road does the car travel during your reaction time?
one year ago

Answers : (1)

Saurabh Koranglekar
askIITians Faculty
3290 Points
							Dear student

V^2 = U^2 – 2aS

U= 217*5/18 m/s

S=170 m

you can find a

Kindly ask only one question at a time
one year ago
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  • 101 Video Lectures
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Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions

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