Language: 
To browser these website, it's necessary to store cookies on your computer.
The cookies contain no personal information, they are required for program control.
  the storage of cookies while browsing this website, on Login and Register.

GDPR and DSGVO law

Storing Cookies (See : http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm ) help us to bring you our services at overunity.com . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
https://overunity.com/5553/privacy-policy/
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding

User Menu

Google Search

Custom Search

Author Topic: Apparent paradox of potential energy  (Read 1013 times)

Offline nix85

  • Hero Member
  • *****
  • Posts: 1148
Apparent paradox of potential energy
« on: November 29, 2020, 02:30:55 PM »
i was just watching about electric potential energy and potential again..

ELECTRIC POTENTIAL ENERGY dependent on the charge experiencing the electric field
ELECTRIC POTENTIAL only dependent on the position of the object

https://www.youtube.com/watch?v=_e6M5_FVn04

v = u/q

that is, electric potential is electric potential energy per charge or

1 volt = 1 joule/coulomb

also

u = kQq/r

that is, electric potential energy is coulomb's constant times charges over distance between them

when you insert second formula into first and cancel the two qs, it follows

v = kQ/r

so we see potential is proportional to amount of charge and inversely proportional to distance between charges


later in the video he shows practical example how potential falls farther from the charge

all sweet, basics

but now consider the gravitational equivalent

gravitational potential also falls as we get farther from earth

BUT

object above that are farther away (to certain distance) have HIGHER potential energy

Work = force * distance moved

that is

Mass * Gravity * Height

do you see the apparent contradiction.

i think it is due to a fact potential energy of objects on the ground doesn't matter since they can't move anyway and can't do work, while those suspended above ground have potential to fall and do work.