Halliday, Fundamentals of Physics, 10e Hele I NEXT ASSIGNMENT RESOURCES HW2 Chap

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Halliday, Fundamentals of Physics, 10e Hele I NEXT ASSIGNMENT RESOURCES HW2 Chapter2 Spring Chapter 02, Problem 003 2018 An automobile travels on a straight road for 44 km at 29 km/h. It then continues in the same direction for another 44 km at 58 km/h. (a) What is the average velocity of the car during this 88 km trip? (Assume that it moves in the positive x direction.) (b) What is the average speed? (a) Number (b) Number 002 005 015 017 028 068 045 051 Units Units SHOW HINT By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your Question Attempts: O of 2 used SAVE FOR LATER SUBMIT ANSWER Review Score Review Results by Study Earn Maximum Points available only if you answer this question correctly in your first attempt. Objective

Explanation / Answer

time taken, t= d / v

t1 = (44/29) and t2 = 44/58

and t = t1 + t2 = 2.276 hr

(A) average velocity = displacement / time

= 88 / 2.276

= 38.7 km/h

(B) it moves in same direction. (no direction change)

hence average speed = average velocity

hence average speed = 38.7 km/h

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