In elastic collision between spheres `P` and `Q` of equal mass but unequal radii , move along a straight line. Which of the following may be correct after the collisions ? (i) `P` comes to rest and `Q` moves with velocity of `P`. (ii) `P` and `Q` move with equal speeds making an angle of `45^(@)` each with original line of motion. (iii) `P` and `Q` move with unequal speeds , making angles of `30^(@)` and `60^(@)` with the original line of motion , respectively. (iv) `P` comes to rest:A. `(i)` onlyB. `(iv)` onlyC. `(iii)` onlyD. `None

In elastic collision between spheres `P` and `Q` of equal mass but une

1.	In elastic collision between spheres `P` and `Q` of equal mass but unequal radii , move along a straight line. Which of the following may be correct after the collisions ? (i) `P` comes to rest and `Q` moves with velocity of `P`. (ii) `P` and `Q` move with equal speeds making an angle of `45^(@)` each with original line of motion. (iii) `P` and `Q` move with unequal speeds , making angles of `30^(@)` and `60^(@)` with the original line of motion , respectively. (iv) `P` comes to rest:A. `(i)` onlyB. `(iv)` onlyC. `(iii)` onlyD. `None
Answer» Correct Answer - C After collision, spheres will move in the perpendicular direction. (i) If the mass of colliding bodies is same and collision is elastic. After the head-on collision,velocities will be exchanged and bodies will move in a single straight line. (ii) If collision is not head - on , bodies will move in the perpendicular direction.

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