This problem is from one of my practice papers for the JEE , the situation of a freely falling rotating ball which collides with the ground twice.
Question asks for the horizontal distance covered between the first two collisions .
Coefficient of restitution , coefficient of friction , mass and moment of inertia of a ball are given.
During the collision of the ball with the ground , normal reaction force is impulsive , since normal reaction is huge at that instant - friction also has to be huge - meaning it has to be impulsive .If friction is huge , then the lowest point of the ball has to come to rest during the course of collision.
I've tried all this numerically , which give me a wrong answer which questions the assumption "Is friction impulsive in this case"
Is my calculation wrong