You are to drive to an interview in another town, at a distance of 290 km on an expressway. The interview is at 11:15 a.m. You plan to drive at 100 km/h, so you leave at 8:00 a.m. to allow some extra time. You drive at that speed for the first 110 km, but then construction work forces you to slow to 44.0 km/h for 43.0 km. What would be the least speed needed for the rest of the trip to arrive in time for the interview?

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 to drive to an interview in another town, at a distance of 290 km on an expressway. The interview is at 11:15 a.m. You plan to drive at 100 km/h, so you leave at 8:00 a.m. to allow some extra time. You drive at that speed for the first 110 km, but then construction work forces you to slow to 44.0 km/h for 43.0 km. What would be the least speed needed for the rest of the trip to arrive in time for the interview?

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Step 1 :Introduction

The velocity of an object is calculated by using the formula v=xt , where is the distance travelled and is the time taken .

 

The total time available for the person is ttotal=3.25 hr .

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