Finding the differential equation for a oscillating system


by JustinLiang
Tags: differential, equation, oscillating
JustinLiang
JustinLiang is offline
#1
Dec8-12, 04:49 AM
P: 82
1. The problem statement, all variables and given/known data



3. The attempt at a solution
I don't think this is the correct answer because for some reason I have a constant mg term. Usually I get mgsinθ and from small angle approximations it becomes mgθ, but this time I am getting mgcosθ and from small angle approximations it becomes mg.



What am I doing wrong? Or is this correct?
Phys.Org News Partner Science news on Phys.org
Simplicity is key to co-operative robots
Chemical vapor deposition used to grow atomic layer materials on top of each other
Earliest ancestor of land herbivores discovered
haruspex
haruspex is offline
#2
Dec8-12, 05:14 AM
Homework
Sci Advisor
HW Helper
Thanks ∞
P: 9,151
I don't see the distances in your expressions for the moments.
theBEAST
theBEAST is offline
#3
Dec8-12, 03:17 PM
P: 366
Quote Quote by haruspex View Post
I don't see the distances in your expressions for the moments.
I just tried this question and did it with the distances, but I also don't understand why there is a constant term. That term is throwing me off.

haruspex
haruspex is offline
#4
Dec8-12, 04:09 PM
Homework
Sci Advisor
HW Helper
Thanks ∞
P: 9,151

Finding the differential equation for a oscillating system


Quote Quote by theBEAST View Post
I just tried this question and did it with the distances, but I also don't understand why there is a constant term. That term is throwing me off.
Please post your working if you'd like further assistance.


Register to reply

Related Discussions
how to solve this system of Differential equation Differential Equations 1
Need keep in solove a system of differential equation Calculus 2
DSP - Differential Equation for linear system H Engineering, Comp Sci, & Technology Homework 45
Determining the Equation for an Underdamped Oscillating System Introductory Physics Homework 4
system of linear differential equation Calculus & Beyond Homework 3