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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?
 2 years ago
 2 years 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?
 2 years ago
 2 years ago

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

rajathsbhat Group TitleBest ResponseYou've already chosen the best response.1
Righto!
 2 years 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?
 2 years ago

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

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

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

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
ahh thanks
 2 years 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
 2 years 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?
 2 years 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
 2 years 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).
 2 years 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.
 2 years 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?
 2 years 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!
 2 years 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
 2 years ago

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

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

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

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

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

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

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

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