Question

25. For head-on collision between two colliding balls of
equal radii r, the impact parameter is equal to
(1) 2r
(2) Zero
(3) More than 2r (4) Less than 2r​

Answer 1

Answer: option 2) 0 is correct

Explanation:The impact parameter b is defined as the perpendicular distance between the path of a projectile and the center of a potential field U(r) created by an object that the projectile is approaching (see diagram).

So, impact parameter zero.

Answer 2

Explanation:

line joining the centre of 2 particle is impact parameter

in this case the radi of 2 balls is equal hence there is no more impact on any balls.

》R-R =0