A bullet of mass 100 gram travelling horizontally at 150 metre per second embeds itself in centre of block of wood match 2.9 kg which is suspended by a light vertical strings 2.5 metre in length.  What is maximum angle made by string with vertical after impact ?

As the forward bias potential across the PN junction is increased,

A bullet of mass 100 gram travelling horizontally at 150 metre per second embeds itself in centre of block of wood match 2.9 kg which is suspended by a light vertical strings 2.5 metre in length.  What is maximum angle made by string with vertical after impact ?

Ball A  attached to one end of a rigid massless rod while  the identical ball B is attached to the centre of the rod.  Each ball has a mass of 0.5 kg and the length of each half of the rod is 0.4 metre. This arrangement is held by an empty end and  is whirled around in a horizontal circle at a constant rate so each ball is in uniform circular motion. Ball A travels at a constant speed of 4 metre per second, then the tension on the left of the rod is