My Math Forum  

Go Back   My Math Forum > Science Forums > Physics

Physics Physics Forum


Thanks Tree5Thanks
  • 2 Post By skeeter
  • 2 Post By skipjack
  • 1 Post By skeeter
Reply
 
LinkBack Thread Tools Display Modes
March 12th, 2017, 12:58 PM   #1
Member
 
Joined: Feb 2014

Posts: 91
Thanks: 1

So I got this imaginary number...





I don't think I did this question correctly but anyways what am I suppose to do with this number? Did I make a critical mistake and caused it to be imaginary? Is there more I can do?
The_Ys_Guy is offline  
 
March 12th, 2017, 01:32 PM   #2
Math Team
 
Joined: Jul 2011
From: Texas

Posts: 2,678
Thanks: 1339

one mistake I see is in line #5 ... h = 100 cm = 0.1 m.

If the ball is sliding without rolling, then $v_f = \sqrt{v_0^2 - 2gh}$

... so, is the ball rolling or not?
Thanks from topsquark and The_Ys_Guy
skeeter is offline  
March 12th, 2017, 03:06 PM   #3
Global Moderator
 
Joined: Dec 2006

Posts: 18,250
Thanks: 1439

h = 1m

If the ball is rolling and not sliding, use the method described in the solution to problem 10 here.
Thanks from topsquark and The_Ys_Guy
skipjack is offline  
March 12th, 2017, 03:46 PM   #4
Math Team
 
Joined: Jul 2011
From: Texas

Posts: 2,678
Thanks: 1339

Quote:
Originally Posted by skipjack View Post
h = 1m
yep ... dyscalcula ... 1.0 m
Thanks from The_Ys_Guy
skeeter is offline  
Reply

  My Math Forum > Science Forums > Physics

Tags
imaginary, number



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Questions about imaginary number i HawkI Number Theory 24 April 10th, 2016 07:09 AM
Power series - proof for substituting an imaginary number for x PenguinHelper Complex Analysis 3 February 2nd, 2015 07:42 PM
imaginary part of a complex number rayman Complex Analysis 4 February 22nd, 2013 10:21 PM
Imaginary number problem skarface Algebra 6 March 10th, 2012 11:01 PM
Lots of imaginary number problems Malgrif Algebra 5 September 17th, 2009 04:26 PM





Copyright © 2017 My Math Forum. All rights reserved.