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    Potential energy and separation graph

    http://img835.imageshack.us/i/anmol.png/ the graph is as per the link but my question is that at a particular point the potential energy becomes zero.....is thre any significance for it?
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    Derviation of Moment of inertia

    i am just confused or i mean trying to figure out why some quantities depends on square of a given quantity and some degree of 1 of it.....
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    Derviation of Moment of inertia

    my question is why is the square force=ma not force=ma^2
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    Derviation of Moment of inertia

    our lecturer defined MI as inertia of body in circular motion(i don't know anything about inertia) except that it is something to oppose my question is that when M.I in circular motion depends on both mass and radius(distance from axis) of the body. why MI is represented as mr^2 why is it...
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    Centripetal and fugal forces

    Thanks everyone rcgldr,tiny-tim,Doc Al and vish_al210 for more kind of conceptual approach....really helpful of u guys.......
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    Centripetal and fugal forces

    @Doc Al the net downward force is mv^2/r is there any circular concept hidden behind it?
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    Centripetal and fugal forces

    i guess u guys are not getting the question, see the diagram it represents a car on 2 mountainous track in both the cases gravity acts downwards a force mv^2/r acts upwards according to books so from newtons second law of motion we subtract both finding out the reaction force on the car by...
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    Centripetal and fugal forces

    but force on the car on the pavement as per the diagram is inward force and path on car is outward what r u trying to say?
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    Centripetal and fugal forces

    cannot get what u want to say tough reactive centripetal force was useful..how can he force exerted by contact path be inward?
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    Centripetal and fugal forces

    that means the force exerted by car on road is not centrifugal,so it is only the action force on the ground and nothing else? but, i encountered a image:- http://img818.imageshack.us/img818/4782/anmol.png [Broken] it states that reaction force on the car is mg-mv^2/r so here it is...
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    Centripetal and fugal forces

    when we travel around a circular path we exert force on the path(ground)can be considered centrifugal force and petal which acts inwards,as a reaction to it.......it violates the rule that force of centrifugal is pseudo force.......... then what exactly is centrifugal force who gave this...
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