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State that WORK is DONE or NOT.....
A WindMill is lifting water from a well.
and also justify your answer..
 one year ago
 one year ago
State that WORK is DONE or NOT..... A WindMill is lifting water from a well. and also justify your answer..
 one year ago
 one year ago

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mayankdevnaniBest ResponseYou've already chosen the best response.0
am confusing.....plz help me
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
for windmill work is not done and for water work is done!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
no @VVEFF question is one!!
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
work is done then! because windmill is applying force to pull up the water and the water itself displaces! now it depends on the angle between the force applied by the mill and the direction of water!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
yaa.. i know but my teacher says the work done is zero..
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
she would be considering cosQ =0, then she's right
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
can you help me @ganeshie8 and @gerryliyana
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
what is this? i can't understand
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
workdone=FxDxcos(Q) where Q is the angle between the force F and displacement D.
 one year ago

gerryliyanaBest ResponseYou've already chosen the best response.0
the work done is zero., because windmills always return to the original point
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
how can we know that angle is of cosQ
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
yeah thats the point @gerryliyana ! he is considering water anf mill, both as a system!
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
and in case of water ! water is displaced by force!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
work is done then! because windmill is applying force to pull up the water and the water itself displaces! now it depends on the angle between the force applied by the mill and the direction of water! @gerryliyana in this case!!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
so in that case...
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
nice What! @gerryliyana ! gve him the answer man! lol....
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
so finally whats the conclusion of this answer.
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
@Aperogalics have a look!!
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
the conclusion is that if u are considering the both as a system then the work is done ; iff Q is not equals to 1.5707. and if the system is only the mill then the work is said to be not done!!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
but the answer is to be written is one
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
in my solution book answer is work is done and the reason is that windmill pulls the water against the gravity...
 one year ago

AperogalicsBest ResponseYou've already chosen the best response.1
@mayankdevnani there are two thing work done by the system and work done on the system here if the system is windmill then work done by the system is zero as there is no net dispacement while work done by the system is +ve as he make the water to be displaced........:)
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
obviously !!!!! @mayankdevnani if its against the gravity the according to the equation F=ma , water has mass and the acceleration is .9.8 mLsecsquare! then the force definitely exists ! and so the workdone!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
so what's the answer??
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
now dude stop confusing your self! the answer is that the work is certainly done by the system!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
m really confused @Aperogalics and @VVEFF what is the concluded answer and answer should be one means both work done or not
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
so i am correct and my teacher is wrong!!!
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
work is done by the system! its certain!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
sure...are you sure about this!!
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
let @Aperogalics be write and then think,. he has creative mind...let @Aperogalics be answer
 one year ago

AperogalicsBest ResponseYou've already chosen the best response.1
@mayankdevnani @VVEFF is very clever he is still saying work is done by the system if ur mam is talking about work done on the system then she is correct and if not then you are correct.........:)
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
no my mam says that the work be zero and i say that work is not zero @Aperogalics
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
lol.. what an answer @Aperogalics
 one year ago

AperogalicsBest ResponseYou've already chosen the best response.1
@mayankdevnani yes ur mam says work is zero but is it by the system or on the system??????????? do you know about which she was talking about??????????????
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
no.. my friend george said that mam says the work done is zero
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
and also 1 thing
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
my senior friend also says that _____ "lifting water" is the work that is done. When anything is lifted  it is moved (displaced) upward against the force of gravity. The force that lifts the object (water) must be greater that that of gravity or the object won't displace upward. The Net force that acts upward to lift (object, water, etc) multiplied by the vertical lift height is defined to be the work done in this process.
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
secondly, there are not more than one work done... right..
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
lastly , what's the concluded answer suppose you are in examination hall and you have a pen and this question ...how would you solve it? @Aperogalics and @VVEFF
 one year ago

VVEFFBest ResponseYou've already chosen the best response.2
i would say that u plz read the conversation above! and conclude the answer urslf!
 one year ago

AperogalicsBest ResponseYou've already chosen the best response.1
@mayankdevnani answer my question and you will get the answer by yourself:)
 one year ago

AperogalicsBest ResponseYou've already chosen the best response.1
a basic question in every book suppose a man lifts a box to his head and walk 40kms . IS THE WORK DONE BY THE PERSON?
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
no work done is zero
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
because force acts in perpendicular direction\[90^{0}\] and displacement is at right angle
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
right @Aperogalics
 one year ago

AperogalicsBest ResponseYou've already chosen the best response.1
is the work is done against gravity?????
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
dw:1352199535611:dw
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
why thats have no answer
 one year ago

AperogalicsBest ResponseYou've already chosen the best response.1
yes that's the thing force is applied against gravity and displacement is zero heredw:1352199714164:dw there displacement is in perpendicular direction and here no displacement
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
thnx... i get it
 one year ago

AperogalicsBest ResponseYou've already chosen the best response.1
always for you help here i asked 2 different question bith r work but done by different systems.....k:) so if the question is of IIT then it will mention the system otherwise my first post is the answer:)
 one year ago

SheldonEinsteinBest ResponseYou've already chosen the best response.1
I will say a small thing that "pulley" is the main thing here... dw:1352284103729:dw
 one year ago

gerryliyanaBest ResponseYou've already chosen the best response.0
nice @SheldonEinstein
 one year ago

SheldonEinsteinBest ResponseYou've already chosen the best response.1
THanks @gerryliyana :)
 one year ago

mayankdevnaniBest ResponseYou've already chosen the best response.0
@SheldonEinstein so that the work done is zeroo..you would say that
 one year ago

SheldonEinsteinBest ResponseYou've already chosen the best response.1
I had said that and yes Work done is ZERO! (if we are talking about a diff. kind of system)
 one year ago
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