The Total solution for NCERT class 6-12
Answer carefully, with reasons:(a) In an elastic collision oftwo billiard balls, is the total kinetic energy conserved during the short timeof collision of the balls (i.e., when they are in contact)?(b) Is the total linear momentumconserved during the short time of an elastic collision of two balls?(c) What are the answers to (a)and (b) for an inelastic collision?(d) If the potential energy oftwo billiard balls depends only on the separation distance between theircentres, is the collision elastic or inelastic? (Note, we are talking here of potentialenergy corresponding to the force during collision, not gravitational potentialenergy).
(a) In this case total kinetic energy is not conservedbecause when the bodies are in contact dining elastic collision even, thekinetic energy is converted into potential energy.(b) Yes, because total momentum conserves as per law of conservation ofmomentum.(c) The answers remain unchanged.(d) It is a case of elastic collision because in this case the forces will beof conservative nature.