• This comment disturbs me. Not by the fact it's insulting; however, about 80 people agreed and promoted this. I have not taken Physics. And my "basic" understanding comes form programming some basic Physics simulations. Like friction, velocity, and gravity. I just learned about atmospheric pressure a﻿ week ago from Chem H; and made me think of this video. Now, I find people of science insulting me, rather then helping me. It's an insult not to me. But to science, the act of sharing knowledge.

• Not completely. If he/she has only taken basic physics, all they've learned about it objects﻿ in systems without friction. So from his/her current perception, they're right.. It would go on forever.. In a Physics 1 world.

#### Video Responses

• That other chap was a prat - ignore him! You're right to ask!! Unfortunately nothing will continue moving forever if﻿ it is moving through anything other than empty space.

• welcome﻿ to the internet, guy.

• No because﻿ of friction.

• like you﻿ know who he is, he could be a 10 year old

if you were be a 10 year old you will be asking that

• it﻿ will just continue to swing forever, or is there some point where it stops moving?

• Makes you think twice about vibration and music strings in regards to all things set in﻿ motion.

• Wind﻿ resistance can be looked at like friction. Also, you only look at linear friction. These pendulums experience rotational friction. It's a very different problem

• Yeah, I'm in high school taking physics right now. It's not that we neglect friction, we actually did a whole unit on friction.﻿ What we neglect in all problems is wind resistance.

• That's exactly what I said. If you live in a Physics 1﻿ world, you might not be dealing with those small forces (friction, wind resistance, which is also friction). Don't talk to me like you're correcting me when you're just saying the exact same thing in a less intelligent way.

• If you ignore the fact that﻿ the thing slows down to the point that it will eventually stop or be disturbed by some very tiny external force, the progression would go on forever.