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lgbasallote
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In 1990, walter arfeuille of belgium lifted a 281.5 kg object through a distance of 17.1 cm using only his teeth
(a) how much work was done on the object by arfeuille in this lift, assuming the object was lifted at constant speed?
 one year ago
 one year ago
lgbasallote Group Title
In 1990, walter arfeuille of belgium lifted a 281.5 kg object through a distance of 17.1 cm using only his teeth (a) how much work was done on the object by arfeuille in this lift, assuming the object was lifted at constant speed?
 one year ago
 one year ago

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lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
im thinking \[\Delta U_{GRAV}?\]
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
Righto!
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
so \[\implies (281.5)(9.8)(00.171)?\] i change this to meters right?
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
0.171 is in metres already. I don't get your question.
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
that multiplication is the answer though..
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
the given was 17.1 i was confirming that i needed to change that to meters
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
or do i use 17.1?
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
ah, yes, it is 0.171 that you need you need to use.
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
ahh thanks
 one year ago

CarlosGP Group TitleBest ResponseYou've already chosen the best response.0
His work was used to increase potential energy of the weight, therefore you can calculate like W=mgh=281.5x9.81x0.171 J I have heard that the work done later on by his dentist to fix his dentures was quite hard
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
a follow up question was (b) What total force was exerted on arfeuille's teeth during the lift what does that mean?
 one year ago

CarlosGP Group TitleBest ResponseYou've already chosen the best response.0
The forced exerted was exactly F=mg=281.5 x 9.81 Newtons
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
It means that a downward force equal to the weight he lifted will be exerted on his teeth (the contact point).
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
Btw, @CarlosGP, I saw a man on TV lift a 1000kgs (a ton) with his teeth. Jus sayin.
 one year ago

CarlosGP Group TitleBest ResponseYou've already chosen the best response.0
I saw another one make the Statue of Liberty disappear! ;) Can you believe it?
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
but this was for real. It was on 'Superhuman' on the DISCOVERY CHANNEL!
 one year ago

CarlosGP Group TitleBest ResponseYou've already chosen the best response.0
I have to see under which conditions was the test carried out. I am not too sure neck muscles can stand that force
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
I'll try to find a video..
 one year ago

CarlosGP Group TitleBest ResponseYou've already chosen the best response.0
@rajathsbhat, I would appreciate it! Thanks!
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
so for (b) it's just gravitational force?
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
@rajathsbhat
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
yes. Sorry, I was busy searching for that vid.
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
haha lol...
 one year ago

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
and yes, it is the gravitational force.
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
thanks!!`
 one year ago
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