A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
A person walks first at constant speed of 5.00 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.00 m/s. What is her average speed over the entire trip?
 2 years ago
A person walks first at constant speed of 5.00 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.00 m/s. What is her average speed over the entire trip?

This Question is Closed

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0why not just 1? i mean it's simpler isnt it?

shubhamsrg
 2 years ago
Best ResponseYou've already chosen the best response.0total dist = 2d total time = d/5 + d/3 = 8d/15 so avg speed = 2d/(8d/15) so @A.Avinash_Goutham was right!! yet again! :D

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0so it will be 30/8 seconds?

FoolForMath
 2 years ago
Best ResponseYou've already chosen the best response.3When the distance is fixed, just find the harmonic mean.

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0what does harmonic mean mean again?

FoolForMath
 2 years ago
Best ResponseYou've already chosen the best response.3For two number a and b the harmonic mean is given by 2ab/(a+b)

kropot72
 2 years ago
Best ResponseYou've already chosen the best response.0Speed = (distance traveled)/(time taken) Total distance traveled = 0 Speed = 0 m/s

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0where a and b are...?

cwrw238
 2 years ago
Best ResponseYou've already chosen the best response.0speed = distance / time if distance = 1 5 = 1 / 0.2 also 3 = 1 / 0.3333 average speed = 2 / 0.53333

FoolForMath
 2 years ago
Best ResponseYou've already chosen the best response.3a=5 and b =3 or viceversa

Nick_Black
 2 years ago
Best ResponseYou've already chosen the best response.0its 3.75 m/s 4 is wrong

A.Avinash_Goutham
 2 years ago
Best ResponseYou've already chosen the best response.0if it's equal " time " u shud use........arithmetic nd equal dist u shud use..........harmonic

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0this is effective everytime d is equal?

Nick_Black
 2 years ago
Best ResponseYou've already chosen the best response.0total distance /total time travelled

FoolForMath
 2 years ago
Best ResponseYou've already chosen the best response.3Yes lgba and when time is equal find the arithmetic mean.

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0arithmetic mean is..?

Nick_Black
 2 years ago
Best ResponseYou've already chosen the best response.02d  d +d   5 3 2d  8d  15 2  8  15

Nick_Black
 2 years ago
Best ResponseYou've already chosen the best response.02  8  15 15  4

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0lol yeah i got that part =)) btw...a followup question is what is the average velocity...the book says zero...is it because displacement is 0?

A.Avinash_Goutham
 2 years ago
Best ResponseYou've already chosen the best response.0yeah it is zero

shubhamsrg
 2 years ago
Best ResponseYou've already chosen the best response.0yes,,because disp is 0..

Nick_Black
 2 years ago
Best ResponseYou've already chosen the best response.0but its speed written in the question???

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0the first question was average speed

Nick_Black
 2 years ago
Best ResponseYou've already chosen the best response.0yeah but there is a difference displacement can come to zero bot distance cannot u should mention adds up whether how many time come and go from same point asdisplacement get zero

javawarrior
 2 years ago
Best ResponseYou've already chosen the best response.0lol really? at 5m/s ?

javawarrior
 2 years ago
Best ResponseYou've already chosen the best response.0A person walks first at constant speed of 5.00 m/s <== that guy must be one heck of a power walker haha
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.