?
Solved

Please explain straight line motion question ?

Posted on 2013-11-03
5
Medium Priority
?
317 Views
Last Modified: 2013-11-04
A tennis ball with a velocity of  +10.0 m/s to the right is thrown perpendicular at a wall.  After striking the wall, the ball rebounds in the opposite direction with a velocity of -8.0 m/s to the left.  If the ball is in contact with the wall for 0.012s, what is the average acceleration of the ball while it is in contact with the wall ?


This is High School Physics question from straight line motion under constant acceleration chapter.

Please explain the question.   Person standing in front of wall throws the ball towards the ball at +10.0 m/s.  The ball hits the wall and rebounds toward the person at -8.0 m/s.  Did I understand the problem correctly ?
0
Comment
Question by:naseeam
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
5 Comments
 
LVL 27

Accepted Solution

by:
aburr earned 680 total points
ID: 39620708
The question makes sense only if the action takes place somewhere where there is no gravity.
0
 
LVL 27

Assisted Solution

by:aburr
aburr earned 680 total points
ID: 39620711
In that case you can consider just the rebound.
The ball changes momentum. Can you calculate that change?
0
 
LVL 27

Expert Comment

by:aburr
ID: 39620714
actually you do not meed to calculate the momentum.
You know the velocity before and after the collision, you know the time it took to make that change in velocity.
Do you know the equation for average acceleration ?  

 If so write it. If not I can give it to you.
You know everything in that equation.
0
 
LVL 84

Assisted Solution

by:ozo
ozo earned 600 total points
ID: 39620736
ball with a velocity of  +10.0 m/s to the right is thrown perpendicular at a wall.  After striking the wall, the ball rebounds in the opposite direction with a velocity of -8.0 m/s to the left.
I would have called it +8.0 m/s to the left, or  -8.0 m/s to the right.
But in any case, it amounts to a change of |18 m/s|
It looks like you did understand the problem correctly.
0
 
LVL 24

Assisted Solution

by:aadih
aadih earned 120 total points
ID: 39621299
(-) 18/0.012 m/square-second.

[Change in velocity/Time.]

(-) = Deceleration.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction On a scale of 1 to 10, how would you rate our Product? Many of us have answered that question time and time again. But only a few of us have had the pleasure of receiving a stack of the filled out surveys and being asked to do somethi…
Lithium-ion batteries area cornerstone of today's portable electronic devices, and even though they are relied upon heavily, their chemistry and origin are not of common knowledge. This article is about a device on which every smartphone, laptop, an…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

719 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question