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Question: Anne, while driving to college, computes the average speed for her journey to be 20 km/hr. On her return trip along the same route, there is less traffic and the average speed is 30 km/hr . What is the average speed for Anne’s trip:

Booster class
Mechanics 1
Skill
Understanding the basics of motion and acceleration
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Rishabh Jain
Rishabh JainLv6
4 Dec 2020
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

During a certain trip in Colorado, a car runs uphill at a constantspeed of 99.5km/hr for 76.8 minutes, runs downhill at constantspeed 153 km/hr for 28.8 minutes and runs on level ground atconstant speed 121km/hr for a distance of 280km returning to it'sorignal position.

1.Find the car's average speed over the entire trip in km/hr

2. Find the car's average velocity over the entire trip inkm/hr

3.The postion of a car moving along the x-axis is given by theequation x=0.864t squared
-0.268tsquared +0.657 find the speed of the object at t=8.68seconds,


You drive on Interstate 10 from San Antonio to Houston, halfthetimeat 50 km/h and the other half at 99 km/h. On the way backyoutravelhalf the distance at 50 km/h and the other half at99km/h.
(a) What is your average speed from San Antonio to Houston?


(b) What is your average speed from Houston backtoSanAntonio?


(c) What is your average speed for the entire trip?


(d) What is your average velocity for the entire trip?


(e) Describe in words the graph x versus t for (a),assumingthemotion is all in the positive x direction.


(f) Describe how the average velocity can be found on a graphofxversus t.



Read the eBook

Section 2.4 Average Velocity and Average Speed

You drive on Interstate 10 from San Antonio to Houston, half thetime at 56 km/h and the other half at 92 km/h. On the way back youtravel half the distance at 56 km/h and the other half at 92km/h.
(a) What is your average speed from San Antonio to Houston?
km/h

(b) What is your average speed from Houston back to SanAntonio?
km/h

(c) What is your average speed for the entire trip?
km/h

(d) What is your average velocity for the entire trip?
km/h

(e) Describe in words the graph x versus t for (a), assuming themotion is all in the positive x direction.


(f) Describe how the average velocity can be found on a graph of xversus t.

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