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			well many of you must be knowing about ICR - instantaneous centre of rotation . but i here give an example of a very common situation in rotational mechanics .Interpret it carefully . prolem 1 (starter) Consider a purely roll ... 
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			An infinite plane inclined at an angle θ to the horizontal . A point mass m is placed on the plane at very large height . the mass is given a push with 'v' velocity in the horizontal direction along the plane . i.e. the dire ... 
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			we have a uniformly charged hollow solid hemisphere . A is the centre of the circle which is formed by the edge of the hemisphere. (the radius of the circle is therefore R --- R being radius of the hemisphere) B is a point at ...