Thank you so much to MIT and special thanks to this teacher.... i was reading resnick halliday krane when i came across this... the book just told that it cancels but didn't give the explanation... then i watched sir walter lewin 's lectures and didn't even find it there...but here i finally found it!!
Is it possible to prove this result without assuming that force of interaction between two particles is along the line joining them. For example, consider a rod rotating in vertical plane under the influence of gravity, pivoted at one end. The force of interaction between two adjacent particles is clearly not along the length of rod always.
No, no one has been able to prove that sum of internal torques of an isolated system is always zero. Still it is taken as a law because no one has observed angular momentum of an isolated system change. reference: Kleppner and kolenkow :An Introduction to Mechanics pg 253 physics.stackexchange.com/q/584504/279008
Dear Professor, One of my (math engineer) students solved yoyo rolling on the board and after that I show them your video. They were very impressed. I commented with them your explanaitions and how you are able to explain physics. For them it was very nice to work on the mathematics and then to start some physical questions. ¿Did you solve Faucoults pendulum in the North Pole? This will be my next class. i am trying to motivate them to produce 5 min videos.
No,its the force of attraction between the two particles so they have to be on the plane,if its perpendicular then it's an external force and you will get external Torque
omg thanx a lot i was looking so hard for this
Thank you so much to MIT and special thanks to this teacher.... i was reading resnick halliday krane when i came across this... the book just told that it cancels but didn't give the explanation... then i watched sir walter lewin 's lectures and didn't even find it there...but here i finally found it!!
What rank did u get ?
Thank you MIT I was craving for this
Is it possible to prove this result without assuming that force of interaction between two particles is along the line joining them. For example, consider a rod rotating in vertical plane under the influence of gravity, pivoted at one end. The force of interaction between two adjacent particles is clearly not along the length of rod always.
No, no one has been able to prove that sum of internal torques of an isolated system is always zero. Still it is taken as a law because no one has observed angular momentum of an isolated system change.
reference: Kleppner and kolenkow :An Introduction to Mechanics pg 253
physics.stackexchange.com/q/584504/279008
How will the rod rotate in a vertical plane under the influence of gravity? It will become a pendulum the
Thanks MIT...
Dear Professor, One of my (math engineer) students solved yoyo rolling on the board and after that I show them your video. They were very impressed. I commented with them your explanaitions and how you are able to explain physics. For them it was very nice to work on the mathematics and then to start some physical questions. ¿Did you solve Faucoults pendulum in the North Pole? This will be my next class. i am trying to motivate them to produce 5 min videos.
exactly what i was looking for. thanks man
What if the forces are not in the plane of the object but perpendicular?
No,its the force of attraction between the two particles so they have to be on the plane,if its perpendicular then it's an external force and you will get external Torque