Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)
done JEE Main Paper (Held On 11 April 2015) Total Questions - 3
question_answer1) A large number (n) of identical beads, each of mass m and radius r are strung on a thin smooth rigid horizontal rod of length \[L(L>>r)\] and are at rest at random positions. The rod is mounted between two rigid supports (see figure). If one of the beads is now given a speed v, the average force experienced by each support after a long time is (assume all collisions are elastic) :
[JEE Main Online Paper (Held On 11 April 2015)]
question_answer2) A uniform thin rod AB of length L has linear mass density \[\mu (x)=a+\frac{bx}{L},\]where x is measured from A. If the CM of the rod lies at a distance of \[\left( \frac{7}{12}L \right)\]from A, then a and b are related as :
[JEE Main Online Paper (Held On 11 April 2015)]
question_answer3) A particle of mass 2 kg is on a smooth horizontal table and moves in a circular path of radius 0.6 m. The height of the table from the ground is 0.8 m. If the angular speed of the particle is 12 rad \[{{\text{s}}^{\text{-1}}}\text{,}\]the magnitude of its angular momentum about a point on the ground right under the centre of the circle is :
[JEE Main Online Paper (Held On 11 April 2015)]