Recent content by mmainak

why then rotation of the disk decreases and stops at a time while it crawls up? As you said, rotating body doesn't change the angular momentum of its own, only if some external torque applied on it .Which force is supplying this torque??

Actually I am a bit confused with the direction of the frictional force acting on a rotating disk on an inclined plane. I need to find the direction of frictional force on the rotating disk both the cases when it is going up and coming down under the action of an impulsive force applied on...

Homework Statement Electrons emitted with negligible speed from an electron gun are accelerated through a potential difference v along the X-axis. These electrons emerge from a narrow hole into a uniform magnetic field B directed along this axis. However, some of the electrons emerging from the...

Homework Statement am stuck on a magnetic field problem, please help me out.. The XOY plane carries a uniform surface current density k`=50 x^ A/m. What is the magnetic field at the point z = -0.5m? Homework Equations Curl B = mu0J The Attempt at a Solution using stokes theorem Int[Curl...

yes that was mistaken . sorry dia 1 is the original one given in the problem instead of l.a it should be l.(pi/2 -a) but that will not make the answer. how can i proceed then ?

Here I have uploaded two diagram of this problem. here I have approximated a,b being small r= l.a r sin\vartheta=l.b hence \vartheta =sin -1b/a well I also feel that I have over-approxiamted this problem . Is there any other way I can proceed?

Homework Statement In the given diagram find the accelaration of the small and large block respectively. Homework Equations The Attempt at a Solution

Homework Statement a wall is inclined to an angle "a" to the horizontal plane. a pendulum of length "l" attached to the wall making an angle "b" with the horizontal (a >b)is let to oscillate. Collision between the bob and the wall is perfectly elastic.show that the time period of the...