Cramster.com - Homework Solutions, Lecture Notes, Exams, and Free Online Homework Help
Sign Up Now! Login Customer Support
McAfee Secure sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams
Problem Solved.
    Home    
    Homework Help    
   Answer Board   
    Resources (Beta)    
   
You Are Here: Home > Answer Board > Physics > Topic: Deceleration
Member's Topic Headline:

Deceleration

Know the answer? Have a better solution? Share it.
Get Help Now.
View homework problems
explained for free!
Member Testimonials

Question:

Advertisement:
Answer | Ask New Question | Customize Profile | Leaderboards | 
FAQ

Member's Avatar
Scholar
Karma Points: 200
Respect (94%):
Date Posted: 5/8/2008 8:53:53 PM  Status: Live
Deceleration
Course Textbook Chapter Problem
General Physics N/A N/A N/A
Question Details:
A person weighing 490 N stands on a scale in an elevator.  The elevator is moving upward with a deceleration of 2 m/s squared.  The reading on the scale is nearly equal to:
 
a)zero
b) 390 N
c) 490 N
d) 590 N
e) none of them
 

Answers:

Member's Avatar
Scholar
Karma Points: 201
Date Posted: 5/8/2008 9:04:56 PM  Status: Live
Asker's Rating: Helpful   
Response:
Person weighs 490/9.80m/s2 = 50kg
 
acceleration is now 9.80m/s2 down - 2m/s2 up = 7.80m/s2
 
so person weighs 50kg * 7.80m/s2 = 390 N (B)
RN's Comment:
Thanks for the correction.. mega dido's!

Member's Avatar
Expert
Karma Points: 1,024
Date Posted: 5/8/2008 9:05:45 PM  Status: Live
Asker's Rating: Not Helpful   
Response:

w2=w1(g+a)
     =490(9.8-2)
     =3822
RN's Comment:
Thanks for trying..more than I could get!


Member's Avatar
Guru
Karma Points: 2,126
(Paideia (Atlanta, GA))
Date Posted: 7/1/2008 2:08:04 PM  Status: Live
Asker's Rating: Helpful   
Response:

b) 390 N
RN's Comment:
i rate higher for early responses thx
Rate or not rate!!! What goes around comes around!!!



By reading or posting messages on these forums, you are agreeing to the Answer Board's Terms of Service and Conduct (TSC).


About Cramster | Terms of Use | Privacy Policy | Contact Us | Press Room | Site Map | Support | Anti-Cheating Policy

Cramster.com is not affiliated with any publisher. Book covers, title and author names appear for reference only.
Copyright © 2008 Cramster, Inc.