Legend. Thank you. I loved the normal force moving to the pivot. Well drawn. I'd love to know the equation that produces that increasing quantity of normal force. Cos/sin from centre of mass of the mass/length/width or something I guess? Perhaps running through the tipping calculations would be super helpful too)
I haven't worked it out but I'm guessing that as I push the block, that normal force will change in magnitude as well as move towards the pivot. I'm sure we can write equations for these 2 quantities as functions of how I am increasing my pushing force. I don't think sin or cos would be involved as there are no angles in the example I showed. Maybe I am misunderstanding you. There are two practice problems which have tipping calculations. They are in my Statics playlist on my channel, placed right after this video. Thanks for the comment!
Loved the video! A few of my problems had do do with how high or large the force must be to initiate the different reactions, forcing one to use moments when solving these problems. I’d like to see a slightly more complicated video incorporating moments into the process, but I think one could figure those out with the intuition shared in the video, great explanation of concept!
Great video, this helped me understand how friction acts statically and kinetically ! I was wondering if there was a name for the phenomenon when an object overcomes the max static force but slows down immediately and reaches 0 speed again several consecutive time, like when you push a fridge, there is a kind of vibration phenomenon.
Floof my guy i think i know what you are talking about, but I don't know anything about it! I'll come right out and say it. I don't like vibrations. I like more computers and electronics...and enough mechanics to let you build your robot to move the way it wants (and also not break ;)
Excellent.. Esp basic knowledge + common sense. Sooo much better then a bunch of equations untethered to reality. I am not a student but I am trying to build a stable workbench that need not have the table top attached to the legs. Solving real world problems requires your approach (basics + common sense) . Thanks again! I am also trying to build objects that wont tip when subjected to "Human scale" forces. For example I am trying to figure out why scaffolding has a 4 to 1 width to height ratio. Could you do a vid on stability as a function of height? (A a what height does a post become unstable ... or how many blocks will result in an unstable tower?. But most importantly, I believe after watching this vid that if I am pushing BELOW the mid point (center of mass) that makes tipping IMPOSSIBLE. Is that correct? (even the mass were secured to the ground with a hinge ... aka if there were a small block preventing slipping)
"a bunch of equations untethered to reality" is a GREAT way to phrase that. I like understanding things from the intuitive, common sense level. Then, the math simply describes that concept on a numerical level; in a precise way that only numbers can provide. In addition, understanding it visually and linking the equation to it allows the concept to take almost ZERO space in your memory. If you apply this practice to all the engineering things you learn, you're going to start looking like a complete badass to all your friends and enemies
When pushing below the center of mass, it isn’t impossible to tip, but it’s definitely less probable. If the coefficient of friction is really high, then one could push from below the center of mass and apply a moment large enough to overcome the moment applied by gravity, but still small enough to be less than the maximum friction force, leading to tipping. It is impossible to tip an object by pushing at the bottom of it, because you’ll never apply a moment by doing that.
Best video I’ve found to explain why the normal force is used in Frictional Force analysis for non-slippage and slippage conditions.
Thank you.
Thank you! This helped me understand friction a lot better.
Awesome! Glad it helped :)
What a detailed amazing explanation. Thank you!! Love from Nepal.
Awesome you are very welcome :)
I love Nepal because Uncharted 2 (my fav video game of all time) takes place there!
Legend. Thank you. I loved the normal force moving to the pivot. Well drawn. I'd love to know the equation that produces that increasing quantity of normal force. Cos/sin from centre of mass of the mass/length/width or something I guess? Perhaps running through the tipping calculations would be super helpful too)
I haven't worked it out but I'm guessing that as I push the block, that normal force will change in magnitude as well as move towards the pivot. I'm sure we can write equations for these 2 quantities as functions of how I am increasing my pushing force.
I don't think sin or cos would be involved as there are no angles in the example I showed. Maybe I am misunderstanding you.
There are two practice problems which have tipping calculations. They are in my Statics playlist on my channel, placed right after this video.
Thanks for the comment!
Helpful for a quick recap. This is a good refresher. :)
Glad it was helpful!
Loved the video! A few of my problems had do do with how high or large the force must be to initiate the different reactions, forcing one to use moments when solving these problems. I’d like to see a slightly more complicated video incorporating moments into the process, but I think one could figure those out with the intuition shared in the video, great explanation of concept!
im glad!
A real concept booster 👍
Concepts are key!
Amazing!!! thank you for the help
Glad it helped :)
Great video, this helped me understand how friction acts statically and kinetically ! I was wondering if there was a name for the phenomenon when an object overcomes the max static force but slows down immediately and reaches 0 speed again several consecutive time, like when you push a fridge, there is a kind of vibration phenomenon.
Floof my guy i think i know what you are talking about, but I don't know anything about it! I'll come right out and say it. I don't like vibrations. I like more computers and electronics...and enough mechanics to let you build your robot to move the way it wants (and also not break ;)
Excellent.. Esp basic knowledge + common sense. Sooo much better then a bunch of equations untethered to reality. I am not a student but I am trying to build a stable workbench that need not have the table top attached to the legs. Solving real world problems requires your approach (basics + common sense) . Thanks again! I am also trying to build objects that wont tip when subjected to "Human scale" forces. For example I am trying to figure out why scaffolding has a 4 to 1 width to height ratio. Could you do a vid on stability as a function of height? (A a what height does a post become unstable ... or how many blocks will result in an unstable tower?. But most importantly, I believe after watching this vid that if I am pushing BELOW the mid point (center of mass) that makes tipping IMPOSSIBLE. Is that correct? (even the mass were secured to the ground with a hinge ... aka if there were a small block preventing slipping)
"a bunch of equations untethered to reality" is a GREAT way to phrase that. I like understanding things from the intuitive, common sense level. Then, the math simply describes that concept on a numerical level; in a precise way that only numbers can provide. In addition, understanding it visually and linking the equation to it allows the concept to take almost ZERO space in your memory.
If you apply this practice to all the engineering things you learn, you're going to start looking like a complete badass to all your friends
and enemies
When pushing below the center of mass, it isn’t impossible to tip, but it’s definitely less probable. If the coefficient of friction is really high, then one could push from below the center of mass and apply a moment large enough to overcome the moment applied by gravity, but still small enough to be less than the maximum friction force, leading to tipping. It is impossible to tip an object by pushing at the bottom of it, because you’ll never apply a moment by doing that.
Thank you!!!
You're welcome :)
Do applied force be greater than Maximum friction force , in case of tipping? Because the body does not move , please explain it?
Theory without math.