Answered: You are driving 65.0 miles/hour and you…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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You are driving 65.0 miles/hour and you see a police car, so you slow down to 42.5 miles/hour. It takes you 3 seconds to do this. What is your deceleration?
(I asked this one before, but someone plugged in -22.5 miles/hr x 2.237 m/s / 1 mile an hour which I didn't understand)

Expert Solution

Step 1: Determine the given variables

Initial velocity, u = 65.0 miles/hour = 29.057 m/s

Final velocity, v = 42.5 miles/hr = 18.99 m/s

Time taken, t = 3 s

Deceleration, a = ?

We have simply converted miles/hour to m/s.

1 mile/hour = 0.447 m/s

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