Types of Collision

Q. Which one of the following statements is true regarding collision of bodies in absence of external forces? (Considering all surfaces to be smooth)

1. Momentum is conserved in collision but kinetic energy is conserved only in case of elastic collision.
2. Momentum is conserved in collision but not kinetic energy.
3. Both momentum and kinetic energy are conserved in all cases of collision.
4. Neither momentum nor kinetic energy is conserved in elastic collision.

Q. Which of the following options is/are true regarding inelastic collision?

1. Impulse of reformation is greater than impulse of deformation
2. $0<e<1$
3. Impulse of reformation is less than Impulse of deformation
4. $e>1$

Q. When two bodies stick together after collision, the collision is said to be collision

1. partially elastic
2. total elastic
3. total inelastic

Q. Which of the following options is/are true regarding inelastic collision?

1. Impulse of reformation is greater than impulse of deformation
2. $0<e<1$
3. Impulse of reformation is less than Impulse of deformation
4. $e>1$

Q. In a perfectly elastic collision, relative speed of approach and relative speed of separation are

1. equal
2. unequal
3. zero
4. infinite