What Is Work? | Physics in Motion
HTML-код
- Опубликовано: 13 сен 2024
- Work and energy are explored in this segment as we look at the work done by various types of forces. We also investigate what it means for the work done by an object when displacement and force are oriented in a variety of different ways.
For extra resources, teacher toolkits, and more check out our website at www.gpb.org/phy...
Amazing video...lots of efforts and thinking have gone in. Appreciate your "work done" :) Loads of Love from Sri Lanka.
In physics, "work" is when a force applied to an object moves the object in the same direction as the force. If someone pushes against a wall, no work is done on the wall because it does not move. However, depressing a letter on a computer keyboard requires work.
Just the music was a bit too loud.
One thing I find confusing as an amateur physics person who is interested in general relativity: a box that we are holding at a constant height is actually accelerating upwards. It's like the old Einstein thought experiment where a person in a sealed room is holding a box that feels heavy; they can't tell if the heaviness is due to a gravitational field or due to the fact that they are in a rocket which is accelerating upwards. The weight of the box in a gravitational field is equivalent to the force of acceleration that box would experience if you were holding it inside an accelerating rocket ship. According to Einstein only objects in free fall experience no acceleration. So aren't we actually doing work to hold a box at a constant height above the Earth's surface? And when I let it go, doesn't it go into free fall and thus cease to experience acceleration? Isn't that exactly backwards from the definitions given here?
mad work bro
This Video is amazing #ILovePhysics
Thank you so much madam🙏💕
Thanks for watching!
U only sayin this so we could do work in school😭😭😂😂lmao
Physics test: “Without” applying the Energy from within you, choose an object of your choice, and apply only the Force or Net Force needed to push it away from you or pull it towards you. Please let me know if you’re able to. This is only a test. Thank you.
How come when you push box on table in direction of force n said no work done why ?
The definition of work in Physics as what happens when a force causes an object to be displaced is completely erroneous or wrong and work ,hence, is not really force times displacement(F•d). Work is a vector quantity(i.e. it's not a scalar) and ,in general, is defined as a "physical-displacement(ms)" by or due to a force, an impulse, or a kinetic force.
In physics, "work" is when a force applied to an object moves the object in the same direction as the force. If someone pushes against a wall, no work is done on the wall because it does not move. However, depressing a letter on a computer keyboard requires work.
@@junng6848 Sure, work is something that happens "when a force....", but what is that something that happens in one word? This should tell you that something is wrong.
Work is a scalar quantity, as it's the dot product of two vectors, Force and Displacement. The cross product of force and displacement is a vector, called Torque. Work is categorically NOT a vector.
@@clivehamilton9024 Clive, why do you think or believe that work is the dot product of force and displacement and that it is a scalar? Is the reason ,perhaps, because that's what the rest of world says and that's all?
@@BTWPhysics It's because I'm a Physics graduate with 40 years of teaching experience.
i live in a box called 2020
sup
your so funny
Thanks mom !
Curtis>Marcus
Thank for the video, but information is incorrect. You said "if object moves at constant speed then no work is done". It's *wrong*. 0:36
In physics, "work" is when a force applied to an object moves the object in the same direction as the force. If someone pushes against a wall, no work is done on the wall because it does not move. However, depressing a letter on a computer keyboard requires work.
if the body moves with constant velocity, then total work done will zero; it is possible because positive work is cancelled by negative work
Right, she later demonstrates an example of a force moving an object at constant speed with nonzero work when she discusses lifting the box vertically. I like the videos in this series very, very much but this one I think needs a little **cough, cough** work.
am confused
Thiis hurts my brain :)
k
OH ! THATS A BASEBALL!
??
~what is work~
Lol sooo cool I know what work is 🤣🤣🤣🤣🤣
I know your address sir
Ed Beavers WTF???
wallstreetbets sent me here
My teacher sent me here
why would somebody dislike this lol
Because they don’t like it.
Dudemanbro YT exactly bruh
oh no i made a dumb comment
Because my teacher made me watch it and I don’t wanna lol
Dudemanbro YT 😂🤣