Physics P1 and P2: Discussi0n

[BILALrox01]

But as it moves away from the earth the pull of earth decreases( Otherwise we would feel gravity in vaccuum as well)

 

[Tyler Durden]

but in a lift, as the lift goes up the weight increases. it says so in the book

 

[Tyler Durden]

why will it decrease? i think in if we place an iron nail close to or away from the magnet, as long as it is inside the field lines, the iron will be attracted by the same force.

 

[BILALrox01]

It says it appears to increase( I think) which book you talking about??

 

[Tyler Durden]

physics by a.f abbot

 

[BILALrox01]

Thats too heavy for me man..

 

[OakMoon!]

LOL ppl... u still discussing physics paper... aaj bio aa gaya hai....
And the weight will decrease. As u go up the gravitational force of the earth decreases. Just like if u take a magnetic material away frm a magnet, a time will come when it will experience no force...
A body taken away frm earth behaves in the same way. Take it away frm earth and the pull on it will decrease and when out in space there will be no more force acing on the body.

 

[BILALrox01]

my point exactly....but i read smwhere what Tyler is saying so i m nt sure..

 

[BILALrox01]

. http://en.wikipedia.org/wiki/Earth's_gravity

 

[M.Usman Khan]

why will it decrease? i think in if we place an iron nail close to or away from the magnet, as long as it is inside the field lines, the iron will be attracted by the same force.

it wont b attracted by the same force....it depends on the number of magnetic field lines cutting it....also the force is greater near the poles while it gets less further away

 

[Tyler Durden]

yeah u r rite but then how can we know the exact value of weight. its different everywhere. the question specified that the weight while moving up. if it doesn't increase then the question wud have asked us at a constant position and then the theory could be applied that the further away from the centre the less the pull of gravity.

 

[Tyler Durden]

@bilal. it says apparent gravity not apparent weight.

 

[Tyler Durden]

http://en.wikipedia.org/wiki/Weight

On the surface of the Earth, the acceleration due to gravity is approximately constant; this means that the magnitude of an object's weight on the surface of the Earth is roughly proportional to its mass. In situations other than that of a constant position on the Earth, SO LONG AS THE ACCELERATION DOES NOT CHANGE, the weight of an object (the force it exerts against support in any accelerated frame) is proportional to its mass.

 

[shahoo]

paper was quite tough..silly mistakes

 

[maarij]

yup
MW

 

[M.Usman Khan]

is this the only maarij i know....
is this the same delusional demented person or someone else