# Two balls of masses and are moving towards each other with speeds and , respectively. They collide head-on and their speeds are and after collision  Column-I Column- II (A) The speed (in m/s) so that both balls move in same direction if co-efficient of restitution is (p) (B) The speed (in m/s) so that the maximum fraction of energy is transformed to (assume elastic collision) (q) (C) Co-efficient of restitution if stops after collision and m/s (r) 2 (D) If collision is inelastic and the loss of kinetic energy (in after collision may be (s) 4 CODES :   A B C D     a) c c,d a,b,c,d a     b) c,d c a a,b,c,d     c) a c,d c a,b,c,d     d) c,d a,b,c,d c a

## Question ID - 101106 :- Two balls of masses and are moving towards each other with speeds and , respectively. They collide head-on and their speeds are and after collision  Column-I Column- II (A) The speed (in m/s) so that both balls move in same direction if co-efficient of restitution is (p) (B) The speed (in m/s) so that the maximum fraction of energy is transformed to (assume elastic collision) (q) (C) Co-efficient of restitution if stops after collision and m/s (r) 2 (D) If collision is inelastic and the loss of kinetic energy (in after collision may be (s) 4 CODES :   A B C D     a) c c,d a,b,c,d a     b) c,d c a a,b,c,d     c) a c,d c a,b,c,d     d) c,d a,b,c,d c a

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 (b) i.  Solving, we get  is always positive For ii.  For maximum energy to transfer to Solving, we get iii. For this iv. Depends upon  