Go Back   Physics Help Forum > High School and Pre-University Physics Help > Kinematics and Dynamics

Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Sep 2nd 2018, 07:35 AM   #1
Junior Member
 
Join Date: Sep 2018
Posts: 1
Question What are the collision forces applied to the stops in a moving triple pendulum?

Hello,

it's been a while since I did not use lagrangian mechanics and all this stuff and would bet it's needed for my purpose.

Introduction : if I take a simple pendulum and make it collide on its origin with a stop, how much will suffer the stop ? Knowing that the pendulum is subject to an actuating torque + gravity + its current acceleration. (let's say that all the mass is on the extremity and that the link is l meter long.)

I guess we can agree that momentum applied onto the stop = torque + l*(g perpendicular part(t) + m* perpendicular acceleration(t) part).

Actual problem : what if I take now a triple pendulum and want to spawn an instantaneous stop onto its origin, while there are 3 torques + 3 gravity forces + 3 accelerations... but also some joint reactions, right?
Or the same with only a double pendulum...




So assume we know both velocity and acceleration at each mass (we can work with either cartesian or in d(q_i)/dt)... What is unclear on my figures is that unknown joint reaction should also appear on the mouvement drawing (the first one).

Triangle obstacles spawn from nowhere but are fixed and can provide an infinite reaction intensity if needed.

So first I wanna stop the first link, but then I don't know how to determine how much are involved the unknown joint reactions at A2 and A3...

In a nutshell, at the time t3 what is the TOTAL torque applied on A1, assuming forces that appeared at t1 and t2 are still pushing ?

Last edited by traca; Sep 5th 2018 at 05:09 PM. Reason: inverse figures
traca is offline   Reply With Quote
Reply

  Physics Help Forum > High School and Pre-University Physics Help > Kinematics and Dynamics

Tags
applied, collision, forces, moving, pendulum, stops, triple



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
What is the trajectory of a moving object with a force applied to it? elusive1324 Kinematics and Dynamics 1 Jan 9th 2012 04:53 AM
Forces acting on a moving object .daniel Kinematics and Dynamics 2 Dec 14th 2011 11:59 PM
Triple point of water Punch Thermodynamics and Fluid Mechanics 1 Feb 20th 2011 01:12 PM
Formula for elastic collision where both objects are moving? Alexrey Advanced Mechanics 2 Apr 29th 2009 08:21 AM
Motion of point mass under two central forces -- source of one stationary one moving. taureau20 Kinematics and Dynamics 0 Sep 27th 2008 02:52 AM


Facebook Twitter Google+ RSS Feed