To stop a car, first you require a certain reaction timeto begin braking. Then t
ID: 1734407 • Letter: T
Question
To stop a car, first you require a certain reaction timeto begin braking. Then the car slows down at a constant rate.Suppose that the total distance moved by your car during these twophases is 56.7 m when its initial speed is 76.5 km/h, and 24.4 mwhen the initial speed is 44.3 km/h. A)What is your reaction time?B)What is the magnitude of the deceleration?
To stop a car, first you require a certain reaction timeto begin braking. Then the car slows down at a constant rate.Suppose that the total distance moved by your car during these twophases is 56.7 m when its initial speed is 76.5 km/h, and 24.4 mwhen the initial speed is 44.3 km/h. A)What is your reaction time?
B)What is the magnitude of the deceleration?
Explanation / Answer
during reaction time the car moves with the existing speed.the distance is 56.7 m when its initial speed is 76.5 km/h means that76.5*5/18*t=56.7 so t =2.648sec
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