damn!... it took me a total of 30 minutes to solve this problem... too much for an IITian.
Anywayz.. i would like to give this question to you, if you solve it within 30 minutes you're Great!
If within 45 minutes, you're just fit for an IIT entrance exam.
just try it.
question- a point...
beyond "c" what happens?!
it is said that beyond speed of light the body is not defined hence there is no question of this body to exceed c.
Yet for the purpose of argument let's assume that we have acheived a way by which a body can be propelled to c.(lets say by zero point energy or by some...
thank you very much you've solved my problem.
the simple answer to this was that the body will accelerate down due to some smallest inevitable disturbance(at quantum level) and this would change the Static F. to kinetic F. which is lesser. and so new net force acting downwards will be produced...
this case can be thought to be similar to the body on a horizontal plane.
there when force just equal to the static force is applied the body starts moving but with zero acceleration
you say the body will have net force downward then it'll accelerate which contradicts the fact that it moves down with CONSTANT SPEED which cannot happen if net force ACTS.
let me make it clear for you... THE BODY IS OBSERVED TO MOVE DOWNWARDS WITH CONSTANT VELOCITY-- THATS A FACT not my THOUGHT .
infact I'm in favour of the object remaining there or moving randomly(less chance for latter)
just tell me how will you use this N.F to prove that the body just can't move in such conditions ... here actually (as observed) the mass would slide down
great ! you got a point there!
so there is an infinitesimal (or so ) disturbance which changes the static friction to kinetic friction where K.F<S.F
but why has it to move only downwards?
i'm telling to neglect noraml force becoz here the mass is remaining constant and so remains the N.F
so N.F doesn't mean much when we talk of motion along the 2D inclined plane as it doen't change at all with time
brother ... here is my question again-
a mass is placed on an rough inclined plane which has an angle = inverse tan(coefficient of linear frictional force)
in such case the gravity down the plane (inclined) and the limiting frictional force are balanced.
just tell me what will happen next?
just forget those normal forces as we just want the mass to float meaning it should move on the plane randomly or remain still.
here normal aren't required as we are stuck with the plane.
you are not getting my point.. I'm speaking of the active gravity ie- gravity acting along the plane (inclined downwards )
at repose angle they ARE equal and that's what repose angle is meant for.