**Physics Problem on Velocity and Acceleration****Question:**A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s² south. After 6 seconds, its velocity will be:**Options:**a. 20 m/s southb. 43 m/s northc. 20 m/s northd. 7 m/s south (Correct answer)e. 7 m/s north**Solution:**To solve this problem, we can use the equation for velocity under constant acceleration:\[ v = u + at \]where:- \( v \) is the final velocity,- \( u \) is the initial velocity (25 m/s north, which can be taken as +25 m/s),- \( a \) is the acceleration (-3 m/s² since it is in the opposite direction to the initial velocity, i.e., south),- \( t \) is the time (6 seconds).Substituting the values into the equation:\[ v = 25 \, \text{m/s} + (-3 \, \text{m/s}^2 \times 6 \, \text{s}) \]\[ v = 25 \, \text{m/s} - 18 \, \text{m/s} \]\[ v = 7 \, \text{m/s} \, \text{north} \]However, due to the direction south being negative and north being positive, the final direction will actually be:\[ 7 \, \text{m/s} \, \text{south} \]Thus, the correct answer is:**d. 7 m/s south**

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A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s² south. After 6 seconds its velocity will be: a. 20 m/s south b. 43 m/s north c. 20 m/s north d. 7 m/s south Ⓒe. 7 m/s north

A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s² south. After 6 seconds its velocity will be: a. 20 m/s south b. 43 m/s north c. 20 m/s north d. 7 m/s south Ⓒe. 7 m/s north

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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