To stop a car, you require first a certain reaction time to begin braking, during which the car travels at uniform speed, then the car siows down under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 186 ft when its initial speed is 50 mi/h, and 80 ft when its initial speed is 30 mi/h. What are (a) your reaction time and (b) the magnitude of the deceleration?

Question
Show a full solution
Ans.
To stop a car, you require first a certain reaction time to begin braking, during which
the car travels at uniform speed, then the car siows down under the constant braking
deceleration. Suppose that the total distance moved by your car during these two
phases is 186 ft when its initial speed is 50 mi/h, and 80 ft when its initial speed is 30
mi/h. What are (a) your reaction time and (b) the magnitude of the deceleration?
Transcribed Image Text:Ans. To stop a car, you require first a certain reaction time to begin braking, during which the car travels at uniform speed, then the car siows down under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 186 ft when its initial speed is 50 mi/h, and 80 ft when its initial speed is 30 mi/h. What are (a) your reaction time and (b) the magnitude of the deceleration?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

Blurred answer