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December 24th, 2017, 03:42 AM  #1 
Newbie Joined: Dec 2017 From: USA Posts: 3 Thanks: 0  How to model as differential equation ?
Hi guys, it's my first topic and I need to help. I have tried many many times to model this question as differential equation but I could not reach to success despite all my efforts. Can any body help me? I need to write the model of the system as differential equation but I did not understand exactly how to do. I tried many solutions but... So we can assume: M1 = 500KG ; M2 = 450KG m1(t) = 150KG ; m2(t) = 120KG k1 = 20 b1 = 10 k2 = 25 b2 = 15 Last edited by skipjack; December 24th, 2017 at 06:03 AM. 
December 24th, 2017, 03:28 PM  #2 
Newbie Joined: Dec 2017 From: USA Posts: 3 Thanks: 0 
Guys, please help. It is very important. I have an idea for this, while working, it came to my mind. Please think like spring, piston and mass. Like as follows : 
December 24th, 2017, 03:40 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 18,845 Thanks: 1567 
What does "the carrier" mean?

December 24th, 2017, 10:20 PM  #4 
Newbie Joined: Dec 2017 From: USA Posts: 3 Thanks: 0  
April 18th, 2018, 03:43 AM  #5 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,102 Thanks: 850 
Frankly it is not clear to me what "having parameters k and b (stopping force for position and velocity)" means. Are those parameters for friction force? That is, is the friction, or retarding force given by (kx+ bv) where "x" is the position of the car measured from the "tip point of the carrier" and v the velocity of the car? And what is the "tip point the carrier"?


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differential, equation, model 
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